Abstract
The present experiment was designed to elucidate the effect of trunk orthosis on a range of motion of flexion and extension of lumbar vertebrae, as well as that on the performance time of standing up from the floor and getting out of the bed. Trunk orthosis used were a custom-made non elastic lumbar-sacral corset (Type A) and a simple elastic corset on the market (Type B). The results revealed a 50% and 10% reduction in trunk mobility, and 50% and 20% elongation in performance time of basic activities, when wearing the Type A orthosis and Type B corset, respectively.