Abstract
It is shown that chair stand power index considering the influence of leg length is more relevant to muscle strength, power, and muscle cross section, rather than sit-to-stand time index (STS-T). This study aimed to investigate the relationship between movement ability and 10-repetition STS-T as well as sit-to-stand power index (STS-P) calculated by body height and chair legs length. The subjects were 2055 men and women aged 20 to 97 years. Both indices, STS-T and STS-P were found to be related to 10m fast walking and stair climbing. Classification by age resulted in higher correlation coefficient as the age increased. The correlation coefficient of 10m fast walking was found to be high than in stair climbing. STS-T and STS-P determination is suggested to be useful to estimate movement ability or stairs climbing in the elderly, who has fall risk in the determination, and to be available as simple and indirect assessment of walking ability.
