Abstract
This study focuses on the strength training for the elderly people to sustain the ability of independent walking. The strength has the ability to combat weakness, frailty and their debilitating consequences. Therefore, we developed a new strength training machine offering five kinds of exercises particularly for lower limbs; it has the dynamic load control system as the load can be changed appropriately during the exercises. The experiment of estimating the effects on dynamic variable resistance with dynamic load change has been conducted. In this experiment, the subjects trained using the new strength machine and we measured subjects' muscle fatigue by surface electromyogram and Near-Infrared Spectroscopy. The results of experiment show the effects of changing load dynamically during training sessions: the muscle fatigue slower than using constant load in case of the measurement by surface electromyogram.
