Shahid Beheshti University of Medical Sciences The Scientific Journal of Rehabilitation Medicine 2251-8401 10 6 2022 01 21 The Effects of Motion Control Shoes on Knee Joint Co-Contraction in Overweight Individuals With Flat Feet The Effects of Motion Control Shoes on Knee Joint Co-Contraction in Overweight Individuals With Flat Feet 1182 1193 1101191 10.32598/SJRM.10.6.5 FA Aydin Valizadehorang Department of Sport Physiology, Faculty of Educational Sciences and Psychology, University of Mohaghegh Ardabili, Ardabil, Iran. 0000-0002-5890-4972 AmirAli Jafarnezhadgero Department of Sport Managements and Biomechanics, Faculty of Educational Sciences and Psychology, University of Mohaghegh Ardabili, Ardabil, Iran. 0000-0002-2739-4340 Saeid Alihosseini Department of Sport Physiology, Faculty of Educational Sciences and Psychology, University of Mohaghegh Ardabili, Ardabil, Iran. 0000-0002-0192-4358 Journal Article 2020 08 01 <strong>Background and Aims </strong>The study aimed to evaluate the effects of motion control shoes on knee joint co-contraction in overweight individuals with flat feet.<br /><strong>Methods</strong> 15 overweight females with a navicular drop greater than 10 mm were selected with available sampling. Demographic characteristics of participants include Mean±SD age: 26.8±2.5 years, height: 1.7±0.1 m, weight: 82.5±3.2 kg, and Body Mass Index: 28.2±1.1 kg/m2. This study was done during running with both control (Supernova control, Adidas) and motion control (Supernovacushion, Adidas) shoes. An electromyography system recorded selected muscles’ electrical activity and then computed co-contraction values. Paired sample t-test was used for statistical analysis.<br /><strong>Results</strong> Finding demonstrated that during the loading phase, the directed co-contraction of vastus medialis/lateral while using motion control shoes was greater than control shoes (P=0.035). Also, mediolateral-directed knee joint co-contraction<strong> </strong>while running with a motion control shoe was greater than the control shoe during the push-off phase (P=0.020). <br /><strong>Conclusion</strong> Motion control shoes improved directed co-contraction in overweight individuals with flat feet, especially in the frontal plane that could modify imposed knee joint loads.  <strong>Background and Aims </strong>The study aimed to evaluate the effects of motion control shoes on knee joint co-contraction in overweight individuals with flat feet.<br /><strong>Methods</strong> 15 overweight females with a navicular drop greater than 10 mm were selected with available sampling. Demographic characteristics of participants include Mean±SD age: 26.8±2.5 years, height: 1.7±0.1 m, weight: 82.5±3.2 kg, and Body Mass Index: 28.2±1.1 kg/m2. This study was done during running with both control (Supernova control, Adidas) and motion control (Supernovacushion, Adidas) shoes. An electromyography system recorded selected muscles’ electrical activity and then computed co-contraction values. Paired sample t-test was used for statistical analysis.<br /><strong>Results</strong> Finding demonstrated that during the loading phase, the directed co-contraction of vastus medialis/lateral while using motion control shoes was greater than control shoes (P=0.035). Also, mediolateral-directed knee joint co-contraction<strong> </strong>while running with a motion control shoe was greater than the control shoe during the push-off phase (P=0.020). <br /><strong>Conclusion</strong> Motion control shoes improved directed co-contraction in overweight individuals with flat feet, especially in the frontal plane that could modify imposed knee joint loads.  https://medrehab.sbmu.ac.ir/article_1101191_76388fd8b510b3c61a440357e8ad74ff.pdf