Development and Validation of a Leg Press Force Measuring Device to Assess Limb Strength Asymmetry

Abstract

Purpose: To develop and validate a low-cost modular instrument that interfaces with a leg press device to measure limb strength asymmetry.Methods: Fifteen participants completed double-limb leg presses at several weights on a leg press device that was fitted with modular force measuring devices. Asymmetry ratios were calculated for the limbs during concentric, transition, and eccentric phases and compared across phases and weights.Results: Participants demonstrated more symmetrical leg press patterns during higher loads compared to lower loads, particularly during the concentric phase.