A fracture, which mostly results from a fall, is fatal for the elderly. A fall occurred when a person cannot maintain the
body position. Most falls occurred when a person walks on a slippery surface or trips over an object on the ground during
a gait. Most people try to avoid falls instinctively and fall when their attempt fails. As such, this study investigated the
difference between two movements- a movement to avoid falls and a forward-falling movement without a fall-avoiding
movement- by analyzing the body movements of the subjects. A fast-moving fall-guiding device with a pneumatic actuator
was used to guide falls. The movement of the device could simulate a foot slip that may happen during daily activities.
A three-axis acceleration sensor and a Bluetooth module were used to avoid disturbing the body movement during a fall
as a wire sensor or a movement analysis system does.