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Passive stiffness of the Achilles tendon in runners with different levels of performance.

Belaoued, Rayan ; Ronnel, Pauline
(2022)

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Belaoued_Rayan_46211600Ronnel_Pauline_40281700_2021-2022.pdf
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Details

Supervisors
Nguyen, Anh Phong
Faculty
Faculté des sciences de la motricité
Degree label
Master [60] en kinésithérapie et réadaptation
Abstract
Background: Few studies have addressed the impact of passive stiffness on runners performances. In this study, we wanted to find out: 1) the correlation between running performance and passive stiffness, 2) the influence of biomechanical parameters on passive stiffness. Methods: 16 males recreational runners undergo a two-phase experiment. First a VAMEVAL test was performed to get the MAS. Then they ran 5 minutes at 50% of the MAS as a warm-up on an instrumented treadmill, followed by 6 minutes at 65%. Before and after the run, the passive stiffness was measured by a MyotonPro. The energy cost was determined by an ergo spirometer. Results: Only point T8 of the TA has meaningful results. There is a positive linear relationship between RE and pre/post run stiffness difference, and a negative linear relationship between RE and pre-run stiffness. Horizontal mechanical work, propulsive impulse, push off rate, step length, and propulsive peak force were correlated with both RE and difference in pre/post-run stiffness. Some parameters were correlated with RE, stiffness at rest and difference of stiffness pre- and post-run. Conclusion: A greater stiffness at rest and a constant stiffness during the run are correlated with better RE. Biomechanical parameters have an influence on RE as well as on stiffness at rest and on the difference of stiffness pre- and post-run.