Exerted running results in altered impact mechanics and footstrike patterns following gait retraining
| Autor: | Erin Futrell, David R. Mullineaux, Irene S. Davis, K. Douglas Gross |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Adult
medicine.medical_specialty Physical Exertion 030209 endocrinology & metabolism Physical Therapy Sports Therapy and Rehabilitation Running B160 Physiotherapy Young Adult 03 medical and health sciences 0302 clinical medicine Physical medicine and rehabilitation Humans Medicine Injury risk Orthopedics and Sports Medicine Exertion Gait health care economics and organizations Foot business.industry Gait retraining Forefoot Human 030229 sport sciences Middle Aged B830 Biomechanics Biomaterials and Prosthetics (non-clinical) Biomechanical Phenomena body regions Exercise Test Impact Gait Analysis business human activities |
| Popis: | Exertion may alter running mechanics and increase injury risk. Effects of exertion following gait-retraining are unknown. Objectives: To determine how exertion effects load rates, footstrike, and cadence in runners following a transition to forefoot strike (FFS) or increased cadence (CAD) gait-retraining. Methods: 33 (9 M, 24 F) healthy rearfoot strike runners were randomized into CAD or FFS groups. All runners received strengthening exercises and gait-retraining. 3D kinetic and kinematic motion analysis with instrumented treadmill at self-selected speed was performed at baseline & 1-week post-intervention, including an exerted run. Exertion was ≥17 on Borg’s Rating of Perceived Exertion scale or voluntary termination of running. Results: Within group comparisons between fresh and exerted running: Cadence not affected in either group. Foot angle at contact became less plantarflexed in FFS (−2.2°, ±0.4) and was unchanged in CAD. Both groups increased vertical average load rate (FFS +16.9%, CAD +13.6%). CAD increased vertical stiffness (+8.6 kN/m). FFS reduced ankle excursion (1.8°). (p ≤ 0.05 for all values listed). Conclusion: Both FFS and CAD exhibited increased load rates with exertion. Variables that may have increased load rates were different for each group. CAD runners had increased vertical stiffness while FFS runners had reduced plantarflexion at contact and reduced ankle dorsiflexion excursion. |
| Databáze: | OpenAIRE |
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