国立情報学研究所の「学術雑誌公開支援事業」により電子化されました。The objective of this study was to examine the effect of seat cushions on dynamic stability in sitting during a controlled reaching task. Participants were ten young and nine elder men with no physical disability. Four types of seat cushions - an urethane foam, a tempur, a gel type and an air flotation - were tested during a controlled reaching task in frontal direction. When a hip joint angle flexed, the flexion moment of a hip joint was occurred the power of a hip joint. Followed the extension moment of it was absorbed the power of it. And when a hip joint...