Medicine and Health Sciences Commons^™

Effect Of Frontal Plane Foot Position On Lower Extremity Muscle Activation And Limb Positioning In A Single Leg Squat, Elizabeth J. Kornkven

Physical Therapy Scholarly Projects

Purpose/Background: Foot positioning during a single leg landing may affect the muscles above the ankle joint and promote positions of increased vulnerability to ACL injury. The purpose of the study was to analyze muscle activity of six muscles in the lower extremity during completion of a single leg squat on the subject’s dominant leg with the subtalar joint in 5 different positions.

Methods: Seventeen healthy males and females (ages 18‐30) performed five single leg squats in five foot positions: neutral, five degrees and ten degrees of declination, and five degrees and ten degrees of inclination. Electromyography data was collected from …

Influence Of Foot Position On Lower Extremity Muscle Activity, Hayley J. Letvin

Physical Therapy Scholarly Projects

Being that the anterior cruciate ligament (ACL) is the most commonly torn ligament, much research has been performed regarding this matter. Females have been found to be more likely to tear their ACL. This may be due to strength, structural (anatomical), hormonal, and neuromuscular differences compared to men. Several studies have also been conducted to help improve preventative measures with using strengthening and neuromuscular training programs. Many speculations have been made about the precipitating factors of an ACL injury. The general consensus in regard to foot placement is that the foot is usually placed in pronation during an ACL tear. …

Influence Of Foot Position On Lower Extremity Muscle Activation, Casey Darling

Physical Therapy Scholarly Projects

The anterior cruciate ligament (ACL) in the knee is often sprained or torn in injuries resulting from jumping, cutting, or hyperextension of the knee. When the knee is put under a valgus, varus, or rotatory stress it can put strain on the ACL. Lower extremity motor control can help control the amount of varus and valgus stress on the knee. Lower extremity muscle control is involved with preventing this stress and resulting injuries. This study was performed to determine whether the position of the foot (neutral, supination, and pronation) has an effect on lower extremity muscle activity during single-leg squats. …

Effect Of Frontal Plane Foot Position On Lower Extremity Muscle Activation And Limb Positioning In A Single Leg Squat, Marissa N. Laddusaw

Physical Therapy Scholarly Projects

Purpose/Background: This goal of this study was to reach a bottom up understanding of ACL injury occurrence. Subtalar position during single leg stance may affect the muscles associated with the knee joint and promote ACL injury. The muscle activity of six muscles of the leg, thigh, and hip were analyzed during a single leg squat with the foot on surfaces of 10 degrees decline, five degrees decline, neutral, and 5 degrees incline, and 10 degrees incline.

Methods: Seventeen healthy participants between the ages of 18 and 30 performed five rhythmically timed repetitions of single leg squats on surfaces of 10 …