Investigated the effect of squat depth on lower-limb joint motion and muscle activation to better understand performance demands and injury risk during strength training. The study compared parallel squats and deep squats, focusing on how changes in depth influence joint angles, angular velocity, and muscle recruitment in the lower extremities and lower back.

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Motion data was captured using VICON Nexus System, while surface electromyography was used to measure muscle activation in the quadriceps (rectus femoris), hamstrings (biceps femoris), and spinal muscles (erector spinae). Joint kinematics were processed and modelled in Visual3D, and further data analysis was performed in MATLAB to evaluate range of motion, angular velocity, and normalized muscle activation patterns. The findings highlighted increased knee motion and quadriceps activation during deeper squats, providing insight into how squat technique influences biomechanics, performance, and injury risk in both athletic and rehabilitation contexts.