Abstract
This study demonstrates the deformation of the surface area of human skin around knee joint during knee flexion. Ten young-male subjects (age: 21.4±0.69) with intact knee were included in this study. The subjects stood barefoot in uplight stance and did knee flexion exercises (20, 40, 60, 80 degrees). The surface area of skin, knee joint, hip joint and ankle joint angle were respectively measured during the experiment using 3-dimensional motion capture systems. The results showed that 1) the skin at the medial side from top of the patella and the back of the knee from lateral side were respectively expanded and contracted during knee flexion, 2) in the calf and thigh areas, the deformation of skin were changed from contracting to expanding with the increase of knee flexion angle.
