Rehabilitation and Therapy Commons^™

Effect Of Frontal Plane Foot Position On Lower Extremity Muscle Activation And Limb Positioning In A Single Leg Squat, Brian Bolin

Physical Therapy Scholarly Projects

Purpose: There is a high prevalence of ACL injury in the athletic populations, which can carry out short and long term debilitative effects. Most ACL injuries involve minimal to no contact and female athletes sustain a two to eightfold greater rate of injury than male athletes. Not much research has been conducted to see if foot position directly affects the lower extremity muscles, which could result in altered biomechanics at the knee.

Methods: Twelve subjects 18-30 years old participated in the study. EMG analysis measured differences of muscle contractions for the gluteus maximus, gluteus medius, biceps femoris, rectus femoris, lateral …

Effect Of Frontal Plane Foot Position On Lower Extremity Muscle Activation And Limb Positioning In A Single Leg Squat, Brady Stokes

Physical Therapy Scholarly Projects

PURPOSE: Anterior cruciate ligament (ACL) injuries at the knee are quite common, especially in the athletic population involved in sports in which jumping, landing, and cutting activities occur frequently. Previous studies have suggested that lower extremity muscle control plays a role in preventing these injuries. This study set out to determine if foot position influences muscle activation in the lower extremity and, by extension, possibly contributes to the risk of ACL injury. This project examined the activity of lower extremity muscles and the kinematics (movement patterns) of the lower extremity in various foot positions during a single-leg body lowering action. …