부산대학교 도서관

Purpose. We investigated the effect of fat mass value (based on skinfold thickness) and body mass index (BMI) on the center of pressure sway to assess the possibility of predicting the stability of postmenopausal women with and without osteoporosis during the standing position. Methods. A total of 78 postmenopausal women participated voluntarily in the study. Postmenopausal (aged 55-75 years) women were divided into, osteoporotic, (lumbar T-score ≤ - 2.5, n = 51), and nonosteoporotic (lumbar T-score > - 1, n = 27) groups. Total body fat mass was assessed based on skinfold measurement. The isometric strength of the lower limb muscle groups was recorded using a digital hand-held dynamometer. Postural sway was determined by measuring the center of pressure (CoP) sway in the anterior-posterior (AP) and mediolateral (ML) direction during a comfortable double stance position, with eyes open. Results. The fat mass value and BMI were significantly lower in the osteoporotic group than in the nonosteoporotic group. The isometric strength of all lower extremity muscle groups was considerably lower in osteoporotic subjects than in the nonosteoporotic group, except for dorsi flexors and knee extensors. In the mediolateral direction, the CoP sway displacement and velocity were significantly higher in the osteoporotic group than in the nonosteoporotic group. Fat mass was a significant independent variable for predicting CoP velocity in the ML direction (VIF = 2.51, p = 0.050). Conclusions. The low-fat mass value is associated with mediolateral postural instability in postmenopausal women. Losing BMI-fat mass and muscle strength may affect postural instability in postmenopausal women. The cautiously strength-balance exercises may be effective for osteoporotic women to improve stability. [ABSTRACT FROM AUTHOR]