Medicine and Health Sciences Commons^™

Influence Of Foot Position On Lower Extremity Muscle Activation, Erin L. Wessman

Physical Therapy Scholarly Projects

With sports participation be it from children, teenagers, or adults; injuries will occur. In 2008-2009 an increase in high school sports participation was at an all-time high increasing to just above 7.5 million. Within this population, knee injuries ranked 3rd, with anterior cruciate ligament (ACL) injuries ranking 4th among all knee injuries. The purpose of this study was to compare muscle activation of six lower extremity muscles in five different foot positions during a single-leg squat in attempts to associate a certain foot position with an increase/decrease in muscle activation, which could then be proposed as a risk factor for …

Muscle Activity In Lower Extremity During Single-Leg Squat: Role Of Supination And Pronation, Brett J. Debele

Physical Therapy Scholarly Projects

Introduction: Literature has consistently reported a high prevalence of ACL injury rates. A correlation between excessive subtalar joint pronation and ACL injury rates has been noted but research into plausible reasons for this relationship is limited. The purpose of this study was to establish potential cause-and-effect relationships between foot position and ACL injury risk.

Methods: This study used single leg squats with simulated foot positions and examined resulting knee joint forces from motion and lower extremity muscle activation patterns that may cause ACL injury risk. Methods: This study recruited male and female participants aged 18 to 30 from campus at …