Minimalist Footwear - Pedorthic Association of Canada
Transcription
Minimalist Footwear - Pedorthic Association of Canada
Minimalist Footwear WINTER 2013 03 President’s Message 04 Examining a Biomechanical Basis for Injury Prevention with Minimalist Running Footwear 06 Article Review: Examining the Degree of Pain Reduction Using a Multielement Exercise Model with a Conventional Training Shoe versus an Ultraflexible Training Shoe for Treating Plantar Fasciitis 10 Breaking Down Minimalist Footwear Features 10 Metatarsal Stress Fracture Relating to Minimalist Footwear – Case Study 11 Use of Custom Orthotics with Minimalist Footwear 14 The Retail Side of Minimal Shoes 16 Member Profiles A Periodical of the Pedorthic Association of Canada A Periodical of the Pedorthic Association of Canada Winter 2013 President’s Message ryan robinson, C. Ped Tech (C), C. Ped (C) Happy New Year everyone! Another year has come and gone, and a new one is just beginning. Hopefully all of you had a chance to spend some much needed time with family and friends, and you are now revitalized, refreshed and ready to take on the new year - although perhaps some of us are filing for bankruptcy due to all the gift buying (how can a kid’s scooter cost $200 anyhow?). Some of us might also be exhausted from entertaining the constant flow of family and friends, and 5 pounds heavier from all the delicious food we consumed. I need another vacation! The holidays are a time to reflect on the past year, and everything it held. For me, 2012 was definitely a year to remember. I have a lot to be thankful for. I have a fantastic wife, 2 great kids, a successful business that I enjoy, and I am the current President of a wonderful profession. Publisher Information Pedorthics Quarterly A Periodical of the Pedorthic Association of Canada Pedorthics Quarterly is published by: Pedorthic Association of Canada Suite 503 – 386 Broadway Winnipeg, Manitoba R3C 3R6 Toll Free: 1-888-268-4404 Fax: 1.877.947.9767 Email: [email protected] Printed by Unigraphics I consider myself very lucky to be involved with the Pedorthic profession, and to represent you as your President. The holiday time has a wonderful way of putting everything in perspective, and helping to illuminate what is really important. For me, it is the relationships that I have with others that are most important. From our immediate and extended family, to our friends and many colleagues, these relationships help define who we are. Communications Committee My position within the Pedorthic Association has enabled me to meet new colleagues from across the country, and around the world for that matter. The friendships that I have gained from my time on the board are ones that I know will last a lifetime. I look forward to every teleconference and in-person meeting, as I have come to think of these people as friends. Committee Members In addition to reflecting on the previous year, I also had some time over this holiday season to consider my goal setting for 2013. Like many of you, I try every year to have a game plan, a plan of attack, and a list of things that I would like to accomplish by year’s end. I might not be able to check off all the items on this laundry list, but I’m darn sure going to try. If you haven’t already done so, take some time to set some goals for yourself this year. They might be personal. Perhaps you want to run a marathon, spend more time with family, or just take better care of yourself. These goals might also be professional. You might want to advance in your career as a Pedorthist, learn a new skill, or maybe even open your own clinic. One of the beauties of a career in Pedorthics is that it offers so much potential for a motivated person to grow within their career, and in their profession. Take advantage of the opportunities that are given to you! Chair Nancy Kelly, C. Ped Tech (C), C. Ped (C) Vice Chair Amy Guest, C. Ped (C) Alex Whyte, C. Ped (C) Crystallee Ripak, C. Ped (C) Grace Boutilier, C. Ped Tech (C), C. Ped (C) Jim Pattison, C. Ped (C) Michael Ryan, C. Ped (C), PHD Tavish Lahay-Decker, C. Ped (C) Subscriptions: $199 per year in Canada All articles published in Pedorthics Quarterly are the property of the Pedorthic Association of Canada. Copyright ©2013 Pedorthics Canada All rights reserved. Reproduction in whole or in part is permitted only with the prior written consent of the Pedorthic Association of Canada. Address all requests to the PAC office. Trademarks and Registered. Trademarks used in this publication are the property of their respective owners and are used only for the purpose of information. Whatever YOUR goals are, I hope you reach them. Help Us Be Green! PQ Feedback We would appreciate your feedback on the PQ and its articles. Your ideas and thoughts are important to us. Let us know what you think. E-mail your letter (referencing the article title and PQ edition) to: [email protected]. Please include ‘PQ - Letter to the Editor’ in the subject line. PAC also invites you to comment about articles in the PQ via our Linked-In page. If you are interested in contributing articles for the PQ, contact [email protected]. If you would like to receive Pedorthics Quarterly electronically instead of the paper version, contact the PAC office at [email protected]. To those of you who are already receiving the online version, thank you for helping us be green! Did you know you can read past issues of the Pedorthic Association of Canada quarterly publication online? Go to www.pedorthic.ca and log in to your member record. 3 Examining a Biomechanical Basis for Injury Prevention with Minimalist Running Footwear Michael Ryan, PhD, C. Ped (C) There are claims among various manufacturers that wearing minimalist shoes can both improve running performance, and reduce the probability of sustaining a running injury. The performance claim is relatively easy to substantiate, as many models in the minimalist category weigh considerably less than conventional running shoes; a reduction of 100g from running footwear has been associated with a 1% improvement in running performance[1]. The table outlining differences between various models of minimalist shoes, presented elsewhere in this quarterly, illustrates there can be as large as an 8-ounce (226.8g) discrepancy in the weight of a minimalist shoe from a conventional neutralsupportive model. In addition, elastic energy may be better utilized when running barefoot. Early comparisons between barefoot and shod running reported greater pre-activation of ankle plantarflexors (resulting in higher active pre-stretch levels), as well as a reduction in ground contact time when running barefoot. This suggests better storage and restitution of elastic energy from posterior lower leg soft-tissue (specifically the Achilles tendon). The greater efficiency of barefoot running over shod was demonstrated by Divert et al.[2] in 2008. It was speculated to primarily be a function of an increased vertical component of the ground reaction force when running barefoot, coupled with the shift from a rearfoot to midfoot strike pattern. From a clinical standpoint, the implications of minimalist footwear are complex yet poorly understood. To date, there is no published evidence that use of a minimalist shoe can affect the epidemiology of running injuries. The information that is available stems from studies that have collected biomechanical data on runners using a standard running shoe, one or two minimalist footwear models, and/or barefoot that is cataloged, analyzed and interpreted for theoretical injury prevention mechanisms. These theoretical mechanisms are then cross-referenced with known biomechanical risk-factors for a given set of running injuries, and the preventative link for minimalist footwear is established. Unfortunately, there are two flaws with this approach. First, evidence gathered through this approach is circumstantial and merely demonstrates potential associations between a collection of congruent variables; it does not report causation. The absence of direct evidence of this preventative effect reveals it is unknown whether such a link is true, and under what circumstances this truth holds. The second flaw is the unsystematic application of minimalism to this footwear category (indeed, this is a flaw inherent in any footwear research but its effects are acute in minimalist running shoes). One cannot consider all minimalist shoes to be created equally, and these differences could have substantial effects on the relative risk of sustaining an injury. With this background in mind, and understanding the injury preventative effect of minimalist footwear is not complete, 4 a summary of potential biomechanical effects of minimalist shoes will follow. It is through 3 primary mechanisms that minimalist footwear might reduce the injury potential of a runner: the position of the foot at initial contact, lower extremity posture changes throughout stance, and increased strength of foot and lower leg soft tissue. One key biomechanical difference between barefoot and shod running is that the ankle is more plantarflexed while barefoot running at initial ground contact, allowing the medial longitudinal arch of the foot to initially attenuate the force of body weight[3, 4]. As a result, the rate of initial loading and the magnitude of the initial impact peak is lower in barefoot running than shod. In fact, in most barefoot runners, there is a complete absence of an initial impact peak. These mechanical aspects are clinically relevant, as Hreljac[5] has postulated that impact forces are important as a causative factor for running injuries. Also, Milner et al.[6] and Zifchock et al.[7] have shown that impact loading characteristics of runners are associated with the occurrence of tibial stress fractures. The posture of the lower extremity during initial ground contact, and throughout the stance phase of running, has the potential to substantially alter how the joints of the lower extremity are exposed to the stresses of impact and propulsion. Analysis of runners running barefoot typically will flex their knees and hips less, evert their ankles less, internally rotate their hips less, and run with a higher cadence compared to running shod. Any one of these postural changes might be protective against running injuries [2-4]. The reason for this modified lower extremity posture during barefoot running is hypothesized to be a function of the body’s preparation for ground contact, by preferentially adopting a midfoot foot strike pattern - coupled with increased pre-activation of the triceps surae m. to increase the stiffness of the ankle during impact [8]. The lower extremity thus becomes stiffer when resisting the impact from body weight, which might result in reduced loading at the patellofemoral joint of the knee and a lower overall excursion of the hips. Indeed, previous authors have reported an association between increasing step-rate (cadence), lower peak knee and hip flexion, and reduced forces acting on the knee and hip - which may be protective against common running injuries such as patellofemoral pain syndrome, infrapatellar tendinopathy, and injuries related to insufficiencies of hip stabilizers/external rotators such as gluteus medius m. and piriformis m. [9, 10]. As ankle eversion is a large component of foot/ ankle pronation, the reduction in peak ankle eversion with barefoot running may be protective against running injuries of the Achilles tendon [11, 12], lower leg[13], and knee[14]. A question remains, however, whether running barefoot or in minimalist shoes is a necessary requirement for runners to adopt a stiffer, midfoot strike pattern. Especially, it has been shown that such a running posture is possible wearing conventional running shoes while simply increasing step-rate [9]. It is hypothesized that runners might, when running barefoot, instinctively modify their running form in the interest of mitigating impact shock on plantar foot tissue during heel strike. However, it is unknown to what extent a shoe’s stability or cushion elements must be reduced in order to illicit such biomechanical changes mentioned previously. A Periodical of the Pedorthic Association of Canada A third avenue that barefoot or minimalist running is alleged to reduce injuries is through selective strengthening of plantar intrinsic foot muscles and soft-tissue. Evidence for this is almost entirely anecdotal - with majority of claims originating from individuals who have successfully adopted minimalist running, or track and field coaches who utilize systematic exposure to barefoot running as an adjunct training tool [15]. Early research in the concept of barefoot running suggested that increased exposure to barefoot activities, including running, can result in anatomical changes to the medial longitudinal arch and overall foot posture [16, 17]. The potential that the positive adaptations from barefoot running can be translated into a minimalist footwear design have been tested at the Cologne Sports Science Institute, where they report significant improvements to foot strength, muscle cross-sectional area, and agility [18]. The ability of either a minimalist shoe design, or barefoot running, to prevent or treat running injuries directly remains wholly untested. It is recommended that any runner interested in using a minimalist shoe, or clinician looking to refer their use, do so only under the advice that they be incorporated with a very conservative progression. While formally untested, it is nevertheless intuitive that factors such as injury history, weekly running mileage, running experience, and previous footwear stability sub-category used will impact a runner’s tolerance to minimalist footwear. Winter 2013 13. Bennett, J., et al., Factors contributing to the development of medial tibial stress syndrome in high school runners. J Orthop Sports Phys Ther, 2001. 31(9): p. 504-10. 14. Barton, C., et al., Kinematic gait characteristics associated with patellofemoral pain syndrome: a systematic review. Gait Posture, 2009. 30(4): p. 405-16. 15. Robillard, J., The Barefoot Running Book Second Edition: A Practical Guide to the Art and Science of Barefoot and Minimalist Shoe Running, ed. D. Wierenga. 2010, Allendale: Barefoot Running University. 16. Robbins, S. and A. Hanna, Running-related injury prevention through barefoot adaptations. Med Sci Sports Exerc, 1987. 19(2): p. 148-56. 17. Sachithanandam, V. and B. Joseph, The influence of footwear on the prevalence of flat foot. A survey of 1846 skeletally mature persons. J Bone Joint Surg Br. , 1995. 77(2): p. 254-7. 18. Bruggemann, G., et al., Effect of increased mechanical stimuli on foot muscles functional capacity., in ISB. 2005, American Society of Biomechanics: Cleveland. p. 553 References 1. Catlin, M. and R. Dressendorfer, Effect of shoe weight on the energy cost of running. Med Sci Sports Exerc, 1979. 11: p. 80. 2. Divert, C., et al., Barefoot-shod running differences: shoe or mass effect? International Journal of Sports Medicine, 2008. 29(6): p. 512. 3. Squadrone, R. and C. Gallozzi, Biomechanical and physiological comparison of barefoot and two shod conditions in experienced barefoot runners. J Sports Med Phys Fitness, 2009. 49(1): p. 6-13. 4. De Wit, B., D. De Clercq, and P. Aerts, Biomechanical analysis of the stance phase during barefoot and shod running. J Biomech, 2000. 33(3): p. 269-78. 5. Hreljac, A., Impact and overuse injuries in runners. Med Sci Sports Exerc, 2004. 36(5): p. 845-9. 6. Milner, C., et al., Biomechanical factors associated with tibial stress fracture in female runners. Med Sci Sports Exerc, 2006. 38(2): p. 323-8. 7. Zifchock, R., I. Davis, and J. Hamill, Kinetic asymmetry in female runners with and without retrospective tibial stress fractures. J Biomech, 2006. 38(15): p. 2792-7. 8. Divert, C., et al., Mechanical comparison of barefoot and shod running. Int J Sports Med, 2005. 26(7): p. 593-8. 9. Heiderscheit, B.C., et al., Effects of step rate manipulation on joint mechanics during running. Med Sci Sports Exerc, 2011. 43(2): p. 296-302. 10. Derrick, T.R., J. Hamill, and G.E. Caldwell, Energy absorption of impacts during running at various stride lengths. Medicine and science in sports and exercise, 1998. 30(1): p. 128. 11. Ryan, M., et al., Kinematic analysis of runners with achilles mid-portion tendinopathy. foot Ankle Int, 2009. 30(12): p. 1190-5. 12. Azevedo, L., et al., Biomechanical variables associated with Achilles tendinopathy in runners. Br J Sports Med, 2009. 43(4): p. 288-92. Brubacher Technologies Ltd. Is offering FOR SALE its Elmira Location operating under the trade name Foot Foundation, Established in 1978 Offering full service in: • design & manufacture of custom orthopaedic footwear • knee braces and AFO’s • custom orthotics of all kinds • comfort and orthopaedic shelf footwear • full service shoe modification and footwear repair • Certified Orthopaedic Footwear Specialist on staff Sale includes: • all stock • fabrication materials • custom footwear lasts and patterns • CAD/CAM footwear design systems • manufacturing machinery • tools • fixtures Contact: [email protected] 5 Article Review: Examining the Degree of Pain Reduction Using a Multielement Exercise Model with a Conventional Training Shoe versus an Ultraflexible Training Shoe for Treating Plantar Fasciitis. Grace Boutilier, C. Ped Tech (C), C. Ped (C) Ryan MB, Fraser S, MacDonald K, Taunton JE. (2009). The Physician and Sports Medicine. 37(4):1-7. Introduction Plantar fasciitis is a common running-related injury, but its affects appear to have far-reaching implications for individuals who are required to stand for prolonged periods as part of their daily employment. Treatment modalities such as foot orthoses, night splints, corticosteroid injections and physical therapy, among others have produced somewhat equivocal results1-5. Delving further into possible treatment options, researchers from the University of British Columbia recently performed a randomized controlled pilot trial attempting to shed light on the novel application of the ultraflexible training shoe (Nike Free), in combination with a 12-week multielement exercise program to a cohort of 24 injured adults. Inclusion Participants were recruited from advertisements in local newspaper media, and were diagnosed as having plantar fasciitis by an experienced physical therapist. They were diagnosed if they tested positive for tenderness to pressure at the origin of the plantar fascia on the medial tubercle of the calcaneus, coupled with sharp shooting inferior foot pain made worse with activity and/or on rising in the morning. Subjects were excluded if they presented with any comorbidities of the lower extremity, foot or ankle, had symptoms for less than 6 months, or had a history of systemic inflammatory disease, connective tissue disease or previous local trauma to the legs or feet. Protocol Participants were randomly assigned to 1 of 2 groups: 1) a group wearing an ultraflexible shoe, which was Nike Free 5.0 (FREE) or 2) a group in which subjects wore their own conventional running shoes (CON). All shoes in the CON group were confirmed to be classified as either a neutral-supportive, or stability running shoes with similar sole and upper characteristics (thermoplastic midfoot shank and heel counter, and reinforced cushioned material in the heel midsole). A 12-week, four-times-a-week exercise treatment regime was assigned to both groups, with exercises focusing on static and dynamic stretching and balance improvements. Participants performed all exercises with the exception of a tissue- Custom made “house shoes” are now available for a VERY low cost when added to a custom shoe order. 6 A Periodical of the Pedorthic Association of Canada specific plantar fascia stretch while wearing footwear. Adherence to the program was affirmed on an ongoing basis, as each subject submitted a weekly training log and received a phone call each week to ensure clarity and execution of the exercise program. A visual analogue scale was used to measure peak pain levels in the 24 hours prior to assessment, with these testing sessions occurring at initial (baseline), midprogram and conclusion of the study. A 6-month follow up was also performed. Results Twenty-one subjects (9 FREE, 12 CON) completed the study. Three subjects (all from the FREE group) dropped out, with two experiencing an increase in foot pain. A main effect of time was found for the physiotherapy regime, demonstrating a significant reduction in plantar fasciitis pain in both groups. There were no differences in adherence to the exercise regime between groups. The FREE group had significantly greater overall symptom duration. There were no significant differences in pain across footwear groups, but the study did find a trend lower mean pain score in the FREE group at the 6and 12-week test points. There were no significant differences found between groups for pain levels at 6-month follow-up. Discussion The authors report that the implications of this study for pain relief in a population with longstanding (>6-month symptom duration) plantar fasciitis are substantial, reinforced by the fact that half of the participants indicated that they were required to stand for >7 hours per day. They suggest that the increased sole flexibility of the Nike Free 5.0 enable the foot to “better engage its windlass mechanism during toe-off, resulting in great strain on the intrinsic soft tissue structures from an increase in the mechanical work of the foot coupled with greater storage and release of elastic components.” This increased loading in a controlled setting has been shown to be successful in treating other chronic soft-tissue injuries such as Achilles, infrapatellar, and elbow extensor tendons. Limitations The authors acknowledge some limitations to the study, including the small sample size (a given when performing pilot work) and the weight of losing three subjects. They further mention the future usefulness of adjunctive diagnostic criteria beyond those used in this study (sensitivity to palpation and self-report pain), advocating the efficacy of including both structural and function indices (e.g. Foot Function Index, kinematic, imaging, and electromyographic data). The authors also acknowledge a possible intervention bias in that only 1 of the 2 groups received new footwear. While both groups showed a reduction in peak pain (30% CON, 63% FREE), the introduction of novel footwear may have inflated FREE group’s VAS responses. Circumstances surrounding footwear condition and categorization are insufficient and vague. The researchers fail to provide any information pertaining to the existing footwear in the CON group, specifically regarding age and condition. Both neutral and stability running shoe styles were permitted in the CON, mostly likely as a means to rule out any effect of footwear change over the course of the study for this cohort. It is probable that the authors agree that further separation of these two categories of footwear within winter 2013 the CON group, which were here lumped together, could present some interesting discrepancies in subjective pain responses. In fact, they have since done research looking at the differences between footwear in the neutral and stability category. The authors also note that 81% of participants had previously attempted to treat their pain with orthoses intervention. However, there is no indication as to whether participants continued using orthoses up until the time of the study, and if so, whether either test group were instructed to continue using their orthoses. Readers might assume that those in the FREE condition did not use orthoses, however this is not specifically stated and thus creates confusion in interpreting findings. While care was taken to perform fastidious statistical analysis, it could be argued that a multi-intervention approach (footwear and exercise program) may confound the results of the FREE group’s perceptions of pain. That is, one intervention may have had a greater effect than the other, there may have been a combined effect, or conversely one intervention could have cancelled out a more positive outcome of the other. Finally, the authors concede that while a 6-month follow up is valuable to discern the longevity of findings, they also suggest a 12 to 24-month follow up program would serve to more strongly confirm the long term treatment outcomes. Readers might further be interested in both groups’ subjective interpretations of the footwear they used, and whether those in the FREE group continued using the shoes post-study. Conclusion This study found statistically significant support for the application of a 12-week multielement exercise regimen that incorporates static and dynamic stretching, and balance exercises in the treatment of chronic pain (>6 months ) associated with plantar fasciitis. Additional trends may indicate a relationship between decreased shoe structure and symptom reduction, though greater sample size and more clearly defined CON categories are needed to validate these claims. This is a valuable contribution to the field of pedorthics, and merits future investigation that should include additional disease-specific outcome measures (such as foot posture indices, ultrasound, magnetic resonance imagining, etc). References 1. Roos E, Engström M, Söderberg F. (2006). Foot orthoses for the treatment of plantar fasciitis. Foot Ankle Int. 27(8): 606-611. 2. Landorf K., Keenan AM, Herbert RD. (2006). Effectiveness of foot orthoses to treat plantar fasciitis: a randomized trial. Arch Intern Med. 166(12):1305-1310. 3. Hawker F, Burns J, Radford JA, Toit V. (2008). Custom foot orthoses for the treatment of foot pain. Cochrane Database Syst Rev. 3: CD006801. 4. Crawford F, Atkins D, Young P, Edwards J. (1999). Steriod injections for the treatment of plantar fasciitis: evidence of short term effectiveness. A randomised controlled trial. Rheumatology. 38(10):974-977. 5. Greve JM, Grecco MV, Santos-Silva PR. (2009). Comparison of radial shockwaves and conventional physiotherapy for treating plantar fasciitis. Clinics (San Paulo). 64(2): 97-103. 7 KEYNOTE SPEAKERS BOOK YOUR ROOM AT LE WESTIN MONTRÉAL Visit www.pedorthic.ca or call the reservation line (1.877.961.8111) and identify yourself as being with the Pedorthic Association of Canada in order to qualify for the group rate of $185 per night for a traditional room (one king or two queens). The deadline to book your room at the group rate is March 11, 2013. code is for a 10% discount on Tango Plus, Latitude or Executive Class Flexible flights. Public Transportation is available from the Montréal -Trudeau Airport to Le Westin Montréal Hotel. The 747 bus line runs 24 hours a day, 7 days a week. Travel time may vary between 45-60 minutes. Bus fare is $8. The cost to take a taxi would be approximately $40. TRAVEL Air Canada is the official airline of the PAC Symposium in Montréal. You can book your flight at aircanada.com using the promotion code QXAG9GG1. This promotional Be sure to visit Montréal during your stay! www.tourisme-montreal.org EXHIBITORS (as of December 21, 2012) THANK YOU TO OUR SYMPOSIUM SPONSORS A2Z Nussbaum Enterprises AON National Shoe Specialties Ltd. AON Orthaheel (Global Shoe Connection) Biotech Orthotic Design Inc. New Balance Canada Aetrex Worldwide Inc. OrtoTech Inc. Delcam Vittoria Phoenix BioPed Franchising Inc. P.W. Minor c/o XKG Sales Landis International Walking Mobility Clinics Inc. Biotech Orthotic Design Inc. Paradigm Medical Inc. Mephisto Delcam Healthcare Paris Orthotics DJO Global Canada PodiaPlus Drew Shoes Cooperation Portofino Shoes Fodemesi Shoes Ltd. Renia Footech Inc. Roblin Footwear A detailed program will soon be available on our website – www.pedorthic.ca Symposium Registration will open mid-January 2013! Plan to arrive early on Thursday, April 4, for a Pre-Symposium Session presented by National Shoe Specialties Ltd. Kintec Lab Services/Kiwi Software Serum International Labelle Supply Co. Ltd. SOLE Landis International Steenwyk Custom Shoes “EVA & GLUE - Un parfait mélange” Mephisto Canada Tekscan Inc. National Shoe Specialties Ltd. Venosan Canada Inc. Jonathan Fogg- Manager, Business Development Systems, Inc.: " EVA- Improved Performance" New Balance Canada Vittoria Phoenix Newfosco Enterprises Walking Mobility Clinics Nike Nora Dr. Rainer M. Bucholz, Renia-Gesellschaft mbh "Advances in bonding technology: an introduction to water-based adhesives" Breaking Down Minimalist Footwear Features Tavish Lahay-Decker, HBSc(Kin), C. Ped (C) With so many minimalist shoes on the market now, it’s easy to get lost in a sea of information. By utilizing the chart provided below, we can help our patients understand the features that make these minimalist shoes unique – and, which features may be appropriate for them. Shoe Model Rearfoot/Forefoot Heel/Forefoot Mass Stack heights (mm) Differential (mm) (Men’s size 10) Nike Free Run+ 2 26/20 6 8.8 Newton Distancia 25/23 2 9.7 Brooks Green Silence 23/14 9 6.8 Nike 3.0 V3 17/13 4 7.0 Zoot Sports UltraSpeed 17/7 10 6.7 New Balance Minimus 12/8 4 8.2 Saucony Hattori 12/12 0 4.2 4/4 0 6.0 33/21 12 12.2 Vibram 5-Fingers Bikila Nike Pegasus+ 28 limitations in dorsiflexion will not tolerate transitioning into a 0mm immediately. Additionally, ensuring the patient has the appropriate strength, biomechanics and correct running technique are extremely important things to consider. There are cases where someone can transition into minimalist footwear quite quickly, however it is common to move slowly from a 12mm to 0mm as follows: 12mm drop 10mm 8mm 6mm 4mm 2mm 0mm. The need for this should be evaluated on a case-to-case basis. Finally, to most runners the mass of the shoe is important; the heavier the footwear, the more energy required to lift the foot. Dr. Jack Daniels researched the differences between weight of the shoe and the aerobic demand on a runner. He found that adding 100 grams to a shoe increased, the aerobic demand of running by 1%. Additionally, the Nike Research Laboratory found that marathon times could be decreased by 3 minutes by removing 4oz. from a shoe . While making the lightest shoe possible seems like the way to go, Dr. Daniels also noted that when the shoe is made too light by removing more of the midsole, the energy expenditure increased as the muscles have to work harder to compensate for the loss in shock absorption. The mass of the shoe will change depending on the size of the shoe, so it is important to note that these weights are based on a men’s size 10. While there are other variables that are involved in determining whether minimalist footwear is appropriate for your client, ideally this guide should be able to help differentiate which type of footwear might be a good starting point. Special thanks to: Michael Ryan Source: M. Ryan. Footwear and Foot Orthoses. Chapter 5. Home Study Course, American Physical Therapy Association. 2012 (In Press). References The first important piece of information is to compare the differing rearfoot/forefoot stack heights. The stack height refers to the amount of midsole and outsole between the foot and the ground. More material between the foot and the ground may be ideal for those who still need the shoe to aide in shock absorption during activity. However, the durometer of this midsole is typically lower than a traditional athletic shoe, and can be slightly more unstable depending on the wearer’s mechanics. http://www.livestrong.com/article/365597-the-effects-of-shoe-weight-onrunning-speed/#ixzz2AhjPCwB2 The rearfoot to forefoot differential gives us our ‘drop’ measurement with minimalist footwear, ranging anywhere from 0mm to 10mm. It is important to note that some brands, such as Saucony, have decreased all their 12mm drop heights to 8mm. When advising patients on transitioning into minimalist footwear, it’s normal to have them start with a higher drop value and slowly progress to a lower drop. A crucial element to success when making the transition to minimalist footwear is the amount of available ankle dorsiflexion the client has. If the range is limited by soft tissue, a stretching regime might be beneficial. If there is a limitation in the talo-crural joint, a low drop measurement might not be possible. If the limitation comes from a restriction in the talus’ ability to glide, this can potentially be mobilized to increase the available range of motion. Active and passive dorsiflexion testing can help us determine what type of heel drop they can handle. Those with Amy Guest, C. Ped (C) 10 http://runsmartproject.com/coaching/2012/02/06/how-much-does-shoe-weightaffect-performance/ Metatarsal Stress Fracture Relating to Minimalist Footwear – Case Study The patient under review is a male in his mid 40s. He is 5’11” and 175lbs. He is an ex-military, who has stayed very fit over the years. He trains in distance running 4 times per week, and has run 6 marathons in the past. He has used traditional running shoes for both training and competition. After a biomechanical assessment, it was determined that he mildly overpronates, but is otherwise biomechanically sound. He has shallow, thin, boney feet with limited fatty pads and a dropped metatarsal arch. He had recently recovered from a stress fracture of the 2nd metatarsal shaft. It was suggested by his doctor that he might benefit from use of orthoses. He has never had any issues with injury in the past. A Periodical of the Pedorthic Association of Canada The patient reported that prior to the stress fracture, he had recently switched from his traditional, neutral running shoes to a minimal running shoe for training. He immediately started running in the new footwear with no break-in period. After some notable pain, an x-ray confirmed that he suffered a stress fracture to the left, second metatarsal shaft. The client has since gone back to running in his traditional, neutral running shoes and hasn’t encountered any problems. It was confirmed that there were no changes to the client’s training routines, terrain, distance, or intensity. The only change to the client’s training regimen was the use of minimal footwear. The client directly related his recent injury to the footwear change, and the absence of a break-in period. With no history of injury, biomechanical abnormalities or change in training routine, it can only be hypothesized that there is a strong correlation between the footwear switch and the metatarsal stress fracture. Use of Custom Orthotics with Minimalist Footwear Crystallee Ripak, C. Ped (C) Minimalist footwear, and the use of custom made foot orthoses, both seem to be at different ends of a philosophical range. When utilizing custom made foot orthoses in minimalist footwear, there are a few areas to keep in mind that will allow your patient to have some increased support without totally giving up the minimalist footwear experience. The areas are weight, tactile/ground perception, foot strike, and fit. The minimalist footwear on the market is manufactured to be as lightweight as possible. The utilization of fabric uppers and changes to the mid and out sole can aid in achieving the footwear’s light weight. This lightweight concept can also be applied to the custom made foot orthoses. Choosing more lightweight shell materials such as carbon fiber and top cover materials (1.5mm vs 3mm) can aid in keeping the weight of the orthoses to a minimum. Decreasing the amount of materials utilized can also decrease the weight of the device. This can be accomplished by going from a full-length top cover to a sulcus length, or three-quarter length. If using a non fulllength custom orthoses, ensure that the transition at the end of the shell and at the end of the top cover (if using a sulcus length device) are gradual and smooth to minimize the chance of any irritation. Changes to the mid and out sole accomplish some of the reduction in weight of the shoe, but it also means less cushioning for the user. This decrease in cushioning allows for the user to have heightened tactile perception of the ground. By keeping the top covers of the orthoses thinner, this increased feedback from the ground can continue to be facilitated. 11 The importance of fit of footwear is never underestimated by the Pedorthist. Custom orthoses that have not been manufactured to be small and lightweight may make it more difficult for a proper fit to be achieved. A number of minimalist footwear styles are manufactured to have a barefoot or a snug fit. This essentially means there will be less room in the shoe to accommodate both the orthoses and the foot. No cavernous, deep uppers and the lack of adjustable closures, in some styles, make it more difficult to accommodate orthoses that may vary too much in size from the shoe’s original insole. Part of manufacturing slimmer orthoses could include internal rear and forefoot wedging. The use of minimalist footwear is also said to encourage a midfoot strike instead of a rearfoot. The traditional deep heel cups and rearfoot wedging, that are used widely in the manufacture of custom foot orthoses of all shapes and sizes, might not provide the same control and support as they would in a traditional running shoe. It is important to keep in mind that minimalist footwear is not for everyone, just as motion control or stability footwear is not for everyone. One of the roles that a Pedorthist performs is that of patient educator. Education about benefits and drawbacks of any type of footwear will empower patients to make the best decision for them. By keeping in mind some of the benefits and more unique features of minimalist footwear - when compared to the traditional use of custom foot orthoses - it might not become such a dichotomy. 837 Sargent Avenue Winnipeg, Manitoba R3E 0C1 Canada We pride ourselves on offering only high quality materials and components for your fabrication needs. We appreciate the opportunity to do business with you. 2013 PAC Ad.indd 1 12 Check us out and see what we have to offer. www.myrdalorthopedics.com Toll Free 877.395.0081 26/11/2012 9:58:50 AM Built for you to go the distance! Great looking running shoes that excel in performance and provide quick, comfortable relief from pain and discomfort. Specifically designed and developed to help reduce pressure and shock from the areas of your foot most susceptible to pain, while keeping you in proper lower extremity balance & alignment. www.aetrex.com Fat Pad gel 10 mm of technologically advanced gel for shock attenuation The Retail Side of Minimal Shoes Alex Whyte, C. Ped (C) As clinical Pedorthists, our treatment plan for patients is focused on the best possible way we can assist them, using all the tools of our trade. Unfortunately in the clinic, we only see select populations who often have painful problems with their feet. Since we primarily talk to patients who have problems, it can be possible to lose touch with the general public’s concerns. This could mean individuals who have a healthy foot type who don’t need the services of a clinical Pedorthist, but still have questions about minimal running shoes. Being shoe experts, it is important for a Pedorthist to know what the general public knows and what the general public is learning from shoe stores, magazines, and the news about minimal running shoes. For Pedorthists without a retail section, it is important to have a healthy relationship with a local shoe store that can provide the best service for your clients. This ensures there is no language confusion between your treatment plan and the shoe store’s fitting technique. This is also important for sharing education with each other, and especially educating the public. I interviewed Luke MacDonald, Partner Owner of Aerobics First in Halifax, Nova Scotia to find out exactly what the general public thinks about minimal shoes - and, what shoe stores are doing to teach them. A little about Luke MacDonald: As a junior competitive runner, Luke bought his first pair of “real” running shoes in 1980, the New Balance 620, from Aerobics First. The store treated him like a king, and he decided that selling shoes would be a cool job. Starting 2 days after his 16th birthday, Luke began his career in a little store in Dartmouth, NS called A1 Athleticwear. Now, Luke has been selling shoes for 32 years. AW: What percentage of all the shoes stocked at Aerobics First are considered minimal running shoes? LM: About 5% would be considered minimal by Blaise DuBois or Daniel Crumback. That said, 70% of those who buy running shoes from us aren’t actually running. Most are walkers, and simply active individuals. Some might argue that minimal is simply less shoe than you have had before. Transitioning to minimal running shoes is the process of changing from a heel strike running form, to a midfoot running form. I will lead a customer to a few paths, and sell shoes based on their curiosity and willingness to train properly. Then I will set appropriate distance and speed goals, as well as have a grasp of their current physical limitations. I advise most to have a physio assessment by one of the 30 local physiotherapists who attended “The Prevention of Running Injury” course by Blaise DuBois and Daniel Crumback. AW: Would a typical person coming into the store show an interest in minimal shoes? PODIATECH new partner for the worldwide distribution of Noene® in orthopeadic and podiatry field. Sheets Available at 14 Noene® is an extremely effective anti-vibration material. Available with or without fabric in 1mm, 2mm and 4mm thicknesses. Exclusive distributor of PODIATECH Sidas Medical - Phone: (514) 524-2173 - Toll Free: 1(866) 441-2173 Fax: 1(866) 231-8187 - e-mail: [email protected] - www.podiaplus.com A Periodical of the Pedorthic Association of Canada LM: Yes, they generally show an interest. If someone said hey, I don’t know where I should be starting, I would start off with a basic foot sizing assessment using the Brannock fitting device. I would ask them if they have researched good form running techniques, or are they a runner who gets out there for fitness and stress reduction. If they just want to escape, then I would be more inclined to show them a traditional shoe. I lean this way, as the size availability for the average jogger is much greater in traditional shoes than in minimal models. The fit around the foot is still my number one priority. Eighty-five percent of people wear their athletic shoes too small. However, if someone wants to improve their performance and their skill as a runner, I would introduce them to a more minimal shoe. WINTER 2013 the military. He then adapted FPI-6 to create the PesDex, which is a simplified version for shoe fitters. AW: What should common shoe stores be teaching the general public about minimal shoes? Daniel also introduced us to Baise Dubois, who was facilitating a 3-day prevention of running injury clinic for physiotherapists. I was the first running store owner to take the entire course. This information, combined with understanding basic foot function while working for Freeman Churchill at Orthotics East, has allowed me to personally begin running again after believing I was no longer able to. Last year, I raced a 5k in Austin, Texas and ran 21:30. I simply ran once a week (5km at 70% effort which was approximately 30 minutes) in the most minimal shoes we have, New Balance MT10. This year, I plan to do more specific run training and get a little closer to 20 minutes. LM: If they are not taking courses and are not invested in it personally, then they shouldn’t be teaching anything. If you’re not willing to invest time to learn, then you’re going to get into a lot of trouble. If they are invested and willing to be their own guinea pigs, then the first thing to do is go seek out healthcare professionals who understand the pros and cons of good midfoot form running. This was our approach. I saw the tsunami coming 7 years ago and I knew that we didn’t understand how to sell these shoes. Accordingly, I waited for the opportunity to be taught properly. Thankfully I met Major Daniel Crumback, who became our store science mentor. Daniel used Dr. Anthony Redmond’s FPI-6 (Foot Posture Index) to aid in guiding members of The Canadian Armed Forces towards minimal shoes, while reducing the rate of orthotic prescriptions in AW: When did you start to teach your staff about fitting people for minimal shoes? LM: March 2011. That was when we actively began to train staff in our determination process that we will walk our customers through if they are going to transition. AW: This is a tricky question because maybe they don’t like the shoes at all and they don’t come back to you, but how many people remain in their minimal shoe after trying it? 15 LM: What we do first is make sure people are very comfortable coming back to us. One of the things we stress the most is that minimal shoes are not right for everybody. We tell people to give it 2 or 3 weeks and within that time, if there is something that is problematic, to get back in touch with us. We’re very cautious and understanding that if it doesn’t work, then they need to bring them back. We really emphasize that. I’d say 75% to 80% will not necessarily go minimal, but they will start to incorporate a more minimal type of shoe in their training protocol. Right now there is a fair amount of rebound where people have gone more minimal, and then they found it simply did not work for them. So they rebound to a traditional shoe. AW: Do you see more competitive or casual runners? LM: We see both. Some are casual runners who have read about minimal shoes, and are curious. Others are very injured, and they think this is their only ticket back. I fall into this type. AW: Do you encourage teaching people minimal running technique before going into the shoe, or vice versa? LM: It works both ways. As we are a shoe store, we encourage using the proper shoe and always fit the foot first. Anyone can try to increase their cadence to 175 or 180 while running. A more minimal shoe will assist them in running at a higher cadence, where a bulkier shoe will slow down their cadence by promoting a heel strike. But it is important to note that while training through this process, once people fatigue while wearing the minimal shoe, they should stop because it doesn’t have a cushioning safety net for their sloppy heel strike. Typically anything over 10km I will encourage a transition shoe, and I will not likely put the customer in something that is at the far end of the minimal continuum. AW: Do you see minimal shoes being a fad, much like the fat burning rocking shoes? LM: It was definitely a fad. At the outset, it went into an environment that didn’t know how to deal with the numbers of people that were just blindly tossing their regular shoes. There was/is a high incidence of injury, and there was no guidance from the frontline (shoe stores). There was the quaint running book, “Born To Run,” which is an excellent story but is inherently dangerous. People took to the emotion of running barefoot while not recognizing what they should do before they toss their old traditional shoes and don the 5 Fingers. They read about the Tarahumara who have been running like this for centuries, and the readers thought in 3 or 4 runs they can transition into these ultra distance super athletes - which is absolutely ridiculous. Overall, now that the fad is settling out, the opportunity is really good. More people can become effective with it, as long as they become smarter and they start to use the gear appropriately by setting appropriate goals. AW: So when people come in to try a typical minimal shoe, do they usually use them on their road runs, trail runs, or treadmill runs? 16 LM: I think trail has been the leader mostly because the books have been about trail running. Also within trail running itself, because of the conditions, the minimal shoes seem to have some direct benefits due to the articulation of the foot. This trend worked well with trails, then it caught on with road shoes. AW: What would you teach a part-time high school student working at a big box store about minimal shoes? LM: I would teach them foot function and fit first. The bottom line is that if you don’t know how the foot works in the shoe, the minimal shoe means nothing. There were a very high percentage of first runners wearing minimal shoes too small for them. So, it’s hard to say what caused their injury. It could have been the minimal shoe or it could have been the fact that they were wearing shoes that were too small, so the functionality of the foot was restricted within the shoe. And that’s the piece that was missed by everybody. If you have more questions you wish to have answered about the retail side of minimal shoes, I encourage you to visit a local shoe store near you. You will be glad you did! Member Profiles: Jonathan Robinson, C. Ped Tech (C), C. Ped (C) Jonathan Robinson, C. Ped Tech (C), C. Ped (C) got his start in the Pedorthic profession through a family connection. After moving to Nova Scotia with his young family Jonathan was looking for a job that fit his background as a mechanic. His father introduced him to Freeman Churchill, a local Pedorthist and owner of Orthotics East in Halifax. After working with Freeman one year Jonathan obtained his C. Ped Tech (C). He remained in Halifax for another year and a half. In order to get closer to his aging parents, he and his family relocated to Fredericton, where he qualified for his C. Ped (C) and two years later opened his business, ABLE Orthotics. Founded in 1997, the lab service started out of his garage, the company has now expanded to two clinic locations and has five full time employees, including another Canadian Pedorthist, Jenn Gould, who Jonathan got to know while volunteering on the PAC Board. In fact, volunteering with the profession is a passion of Jonathan’s. He began by serving as ethics chair on the PAC Board for five years in the mid 90s. This involvement led to him taking on the role of President-Elect and serving as PAC’s President in 2005-2006. When describing his time with the PAC Board Jonathan recalls the immense efforts put in prior to the insurance industry recognizing pedorthics, and how PAC turned that around. “We’ve really carved out our niche and have done well to place ourselves as advisors of choice. We have become respected players in the footcare community despite the challenges we first faced.” A Periodical of the Pedorthic Association of Canada Involvement has helped Jonathan create strong bonds with other members of the profession. Not just through volunteering but also at the annual Symposium. Remarking on the openness and the willingness to share with each other, Jonathan believes that C. Ped (C)s are extraordinarily helpful and forthcoming with advice on treatments, business practices and moving the profession forward as a whole community. “There is a great continuity in the leadership of both PAC and The College. People have risen to the challenges of leadership, given of their time, professionally and personally to ensure that our profession would thrive. Richard Bosch preceded me as President of PAC, and Michael Van Vlack came immediately after. I can attest that they both gave countless hours to the cause, and were excellent to work with, dedicated and truly selfless in their desire to serve the membership, and elevate Pedorthics in Canada.“ When asked what he would say to a new member getting started in the profession Jonathan’s passion and investment as a long time volunteer is obvious: “If you had a sense of the historical legacy that we have that has brought us to this place, you’d understand it’s volunteerism that’s ensured the job you have now. You have a voice and you have a role to play in perpetuating the profession and ensuring that we continue to be a provider of choice for orthotics and footwear. Any member can find something suited to their interests and strengths. You can volunteer quietly on a committee or get involved with leading the profession by volunteering with the board of either PAC or The College of Pedorthics of Canada.” After stepping back for a few years, Jonathan has again become involved with volunteering within the profession, this time with The College. Currently serving as the Chair, Jonathan says, “I consider it a privilege to work with such a great group of people that are typically very helpful and idealistic. I am proud of what Pedorthics in Canada has become.” WINTER 2013 profession’s propensity to really grow. She quickly applied to the Pedorthic Program at Western University and became enamored with the practice. “It doesn’t feel like a chore coming home to study after a day of clinical—I love it!” Kerrie had known since high school she wanted to work in sports medicine, “my training in kinesiology was a lot of theory,” she explains. “I wanted to apply it.” Not to be discredited, Kerrie cites her kinesiology training, particularly in anatomy, as a big influence in her study of pedorthics. In fact, she plans to maintain both her certification as a C. Ped (C) and as a Certified Kinesiologist moving forward. A native and current resident of Belmont, Ontario, Kerrie now works at Foot Dynamics with Linda and Tony Caruana in St. Thomas where she spends her days sponging up as much as she can. “Every case stands out to me!” Kerrie replied when asked about memorable cases. “My experience in the profession is very little so every case is new and different. Just seeing patients leave the clinic with less pain than when they came in is so rewarding,” she explains. What she enjoys most though is being able to help people—and relatively quickly compared to other similar professions. In conjunction with her full-time studying, her post at another Dr.’s office, and a local swim coach, Kerrie stays busy, and deeply immersed in the field. As for her role at PAC, Kerrie brings a real, genuine enthusiasm to the profession. She hopes to volunteer with PAC soon, perhaps once she gains a bit more time back from her studies. “I have to thank Tony and Linda for everything they’ve taught me in the last year,” she emphasized. PAC congratulates Kerrie on the recent passing of her C. Ped (C) exam. Kerrie Boelsterli, C. Ped (C) Kerrie joined PAC in July, 2012 and brings a fresh new face to the profession—very fresh. In fact, at the time of this writing, she is waiting to find out if she passed the final portion of her Canadian Certified Pedorthist exam. After graduating from Wilfrid Laurier University 2010, Kerrie was indeed using her degree, working as a Kinesiologist, but something was missing. She recalls, “it just wasn’t really stimulating enough—I wasn’t part of treatment as much as I wanted to be. I knew I had to go back to school.” “One day I was on Facebook and I saw an ad for Pedorthics and I clicked on it.” This prompted her to begin researching the profession more deeply, speaking with local pedorthists and specialists. Kerrie is a poster child for the impact digital advertising can have on both young professionals looking at career choices online, as well as the www.facebook.com/pedorthic 17 Share your talents – volunteer with PAC! Are you looking for a way to contribute to your Association but not sure where to start? PAC has a variety of volunteer opportunities that range in time commitment to suit you and your personal interests. Professional Development Committee Do you have a special interest in continued education in Pedorthics? Join the Professional Development committee! This committee is responsible for the oversight and implementation of educational programs for members and other interested allied health care providers. This committee reviews the current needs and interests of the profession and plans events accordingly. Time commitment would include committee meetings (via email or teleconference) and on-site help at local events, varying according to the number of events planned in the year. Communications Committee If you would like to see your work in print, this is the volunteer position for you. The Communications Committee is responsible for the publication of the Pedorthics Quarterly which includes soliciting of submissions as well as some editorial duties. Those with a special interest in current pedorthic studies and issues would be a perfect fit. Time commitment includes participation in regular meetings (either by email or teleconference) as well as submission of original work and vetting the work of others. Social Media Committee This committee is responsible for providing oversight of the Association’s social media strategy (targeted at consumers) including participation in social media outlets. Responsibilities vary as this committee continues to grow and develop, but current committee members are focused on creating original blog posts for PAC’s website as well as materials for the Facebook and LinkedIn pages. Time commitment includes creation of blog posts as well as communication by email. If you are interested in participating on any of these committees, or would like more information, contact Kirsten Parker at the PAC office at [email protected] 18 A Periodical of the Pedorthic Association of Canada WINTER 2013 Thank you to the 2012 corporate sponsors for their support! PAC would like to introduce to you the members of the 2013 CORPORATE SPONSORSHIP PROGRAM gold: silver: Bronze: Aetrex PodiaPlus Renia It isn’t too late to join PAC as a corporate sponsor for 2013! If you would like to support PAC at the Bronze or Silver level and would like more information about the benefits, please contact the PAC office ([email protected] or 1.888.268.4404). The deadline to confirm this sponsorship is January 25, 2013. 19 “ When making my decision of the best workplace for me, I searched for an environment filled with a collegial team of professionals, an opportunity for personal growth through on-going professional education and a company that believed in giving back to the “ community. Alycia Underhill BioPed Pickering My Personal Growth Career options that can lead to management, clinic ownership and share participation My Professional Growth Through professional education and a best practices, encouraging, work environment My Decision. My Future. My BioPed. My Independence Knowing that I have options of where in the BioPed network to work, across the country My Security That comes from the stability of a leader with over 30 years of experience in my field “ “ And I found all this... and more at BioPed My Contribution Being part of a caring culture that gives back to Canadians For more information on employment oppor tunities or to inquire about owning your own BioPed clinic, c all Nanc y Ekels at 1. 905. 829. 0505 x231