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Eight Weeks of Exercising on Sand Has Positive Effects on Biomechanics of Walking and Muscle Activities in Individuals with Pronated Feet: A Randomized Double-Blinded Controlled Trial

1
Department of Sport Managements and Biomechanics, Faculty of Educational Science and Psychology, University of Mohaghegh Ardabili, Ardabil 56131-56491, Iran
2
Division of Training and Movement Sciences, Research Focus Cognition Sciences, University of Potsdam, 14469 Potsdam, Germany
*
Author to whom correspondence should be addressed.
Academic Editor: Belinda Beck
Sports 2022, 10(5), 70; https://doi.org/10.3390/sports10050070
Received: 6 April 2022 / Revised: 23 April 2022 / Accepted: 28 April 2022 / Published: 2 May 2022
This study aimed to investigate the effects of eight weeks of barefoot running exercise on sand versus control on measures of walking kinetics and muscle activities in individuals with diagnosed pronated feet. Sixty physically active male adults with pronated feet were randomly allocated into an intervention or a waiting control group. The intervention group conducted an 8-weeks progressive barefoot running exercise program on sand (e.g., short sprints) with three weekly sessions. Pre and post intervention, participants walked at a constant speed of 1.3 m/s ± 5% on a 18 m walkway with a force plate embedded in the middle of the walkway. Results showed significant group-by-time interactions for peak impact vertical and lateral ground reaction forces. Training but not control resulted in significantly lower peak impact vertical and lateral ground reaction forces. Significant group-by-time interactions were observed for vastus lateralis activity during the loading phase. Training-induced increases were found for the vastus lateralis in the intervention but not in the control group. This study revealed that the applied exercise program is a suitable means to absorb ground reaction forces (e.g., lower impact vertical and lateral peaks) and increase activities of selected lower limb muscles (e.g., vastus lateralis) when walking on stable ground. View Full-Text
Keywords: flat foot; free moment; gait; loading rate; training flat foot; free moment; gait; loading rate; training
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MDPI and ACS Style

Jafarnezhadgero, A.A.; Fatollahi, A.; Granacher, U. Eight Weeks of Exercising on Sand Has Positive Effects on Biomechanics of Walking and Muscle Activities in Individuals with Pronated Feet: A Randomized Double-Blinded Controlled Trial. Sports 2022, 10, 70. https://doi.org/10.3390/sports10050070

AMA Style

Jafarnezhadgero AA, Fatollahi A, Granacher U. Eight Weeks of Exercising on Sand Has Positive Effects on Biomechanics of Walking and Muscle Activities in Individuals with Pronated Feet: A Randomized Double-Blinded Controlled Trial. Sports. 2022; 10(5):70. https://doi.org/10.3390/sports10050070

Chicago/Turabian Style

Jafarnezhadgero, Amir Ali, Amir Fatollahi, and Urs Granacher. 2022. "Eight Weeks of Exercising on Sand Has Positive Effects on Biomechanics of Walking and Muscle Activities in Individuals with Pronated Feet: A Randomized Double-Blinded Controlled Trial" Sports 10, no. 5: 70. https://doi.org/10.3390/sports10050070

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