Classification of forward trunk inclination posture during sit-to-stand

Abstract

The purpose of this study was to investigate the classification of forward trunk inclination posture during sit-to-stand (STS). Three-hundred and nineteen female subjects (aged 22 to 87 years, mean age 57.9), who could perform activities of daily living (ADL) independently, participated in this study. The angle of forward trunk inclination during STS was analyzed using a two-dimensional movement analysis system. The results revealed no significant difference in the angle of forward trunk inclination among age groups. The angle of forward trunk inclination was classified by hierarchical cluster analysis into Types I-V. Cluster analysis revealed significant distinctions between Types II and III, and Types III and IV (p<0.05). No significant correlation coefficient was found between the cluster groups and contextual factors (physical fitness and living environment) by covariance structure analysis. The angle of forward trunk inclination was clarified as suitable for forward trunk inclination posture guide during STS. It is suggested that it is necessary to investigate the influence due to actions resulting from changed kinetic patterns in ADL stereotypes concerning and the character of the subjects.