Akira Minematsu1, Kan Hazaki2, Akihiro Harano3, Nozomi Okamoto4, Norio Kurumatani4. 1. Department of Physical Therapy, Faculty of Health and Science, Kio University, Japan. Electronic address: a.minematsu@kio.ac.jp. 2. Faculty of Biomedical Engineering, Osaka Electro-Communication University, Japan. 3. Department of Orthopedics, Yamato Takada Municipal Hospital, Japan. 4. Department of Community Health and Epidemiology, Nara Medical University School of Medicine, Japan.
Abstract
OBJECTIVE: This study examined differences in physical function according to body mass index (BMI) in elderly Japanese individuals. METHODS: Participants (1754 men and 1795 women aged ≥65 years) were divided into the following five BMI groups: low BMI (≤20.0), low-medium BMI (20.1-22.5), medium BMI (22.6-25.0), medium-high BMI (25.1-27.5) and high BMI (≥27.6). Physical function was measured according to BMI and sex, and associations between BMI and physical function were examined. RESULTS: Compared with the medium BMI group, handgrip strength (HGS), knee extension torque (KET), and knee flexion torque (KFT) were significantly lower in both sexes in the low BMI group, while KET and KFT were significantly higher among men in the high BMI group. One-leg standing time (OLST) with open eyes was significantly shorter among men in the high BMI group than in the medium BMI group. The high BMI group was significantly inferior to the medium BMI group in 10m gait time (10MGT), OLST, and maximum one-step length to height ratio among women. All physical functions, except for 10MGT in men, were associated with BMI adjusted age and/or sex. Muscle strength showed a positive association with BMI in both sexes. There was a stronger association between BMI and physical performance in women compared to men. CONCLUSION: We found that BMI influences a variety of factors related to muscle strength and physical performance. Our findings may help contribute to the prevention of mobility impairments in elderly Japanese individuals.
OBJECTIVE: This study examined differences in physical function according to body mass index (BMI) in elderly Japanese individuals. METHODS:Participants (1754 men and 1795 women aged ≥65 years) were divided into the following five BMI groups: low BMI (≤20.0), low-medium BMI (20.1-22.5), medium BMI (22.6-25.0), medium-high BMI (25.1-27.5) and high BMI (≥27.6). Physical function was measured according to BMI and sex, and associations between BMI and physical function were examined. RESULTS: Compared with the medium BMI group, handgrip strength (HGS), knee extension torque (KET), and knee flexion torque (KFT) were significantly lower in both sexes in the low BMI group, while KET and KFT were significantly higher among men in the high BMI group. One-leg standing time (OLST) with open eyes was significantly shorter among men in the high BMI group than in the medium BMI group. The high BMI group was significantly inferior to the medium BMI group in 10m gait time (10MGT), OLST, and maximum one-step length to height ratio among women. All physical functions, except for 10MGT in men, were associated with BMI adjusted age and/or sex. Muscle strength showed a positive association with BMI in both sexes. There was a stronger association between BMI and physical performance in women compared to men. CONCLUSION: We found that BMI influences a variety of factors related to muscle strength and physical performance. Our findings may help contribute to the prevention of mobility impairments in elderly Japanese individuals.
Authors: Laura Cerón Lorente; María Carmen García Ríos; Santiago Navarro Ledesma; Rosa María Tapia Haro; Antonio Casas Barragán; María Correa-Rodríguez; María Encarnación Aguilar Ferrándiz Journal: Int J Environ Res Public Health Date: 2019-11-16 Impact factor: 3.390