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P406-P465-Sports Medicine/Arthroscopy Posters
Tuesday, Mar 19, 2013, 8:00 AM - 5:30 PM
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McCormick Place, Academy Hall B
Adolescent Runners: The Effect of Training Shoes upon Running Kinematics
+Foot and Ankle (Sports Med/Arthro)
Forefoot; Foot / Ankle; Foot / Ankle; Miscellaneous
Scott M. Mullen
, MD, Kansas City, Kansas
E B. Toby
, MD, Kansas City, Kansas
SUMMARY: The modern running shoe typically features a large cushioned heel intended to dissipate the energy at heel strike to the knees and hips. The purpose of this study was to see the effect shoes have upon the running biomechanics among competitive adolescent runners. We wish to answer the question of whether running style is altered in these athletes due to shoe wear only.
MATERIALS AND METHODS: Twelve competitive adolescent athletes were recruited from local track teams. Each ran on a treadmill in large heel trainers, track flats and barefoot. Four different speeds were used to test each athlete. The biomechanics were assessed with a motion capture system. Stride length, heel height during posterior swing phas and foot/ground contact were measured.
RESULTS: Shoe type dramatically altered running biomechanics. The foot/ground contact point showed differences with footwear (p < 0.0001) and speed (p = 0.000215). When wearing trainers, the athletes landed on their heels 69.79% of the time at all speeds (p < 0.001). The heel was the first point of contact less than 35% of the time in the flat condition and less than 30% in the barefoot condition.
CONCLUSION: Running biomechanics are significantly altered by shoe wear in competitive adolescents. Heavily heeled cushioned trainers promote a heel strike pattern whereas track flats and barefoot promote a forefoot or mid foot strike pattern. Training in the heavily cushioned trainer by a competitive adolescent runner may be detrimental to performance due to these altered running biomechanics. It is unknown whether the altered biomechanics of the heavily heeled cushioned trainer may be detrimental to the adolescent runner who is still developing a running style.
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