Iwasaka Chiharu, Mitsutake Tsubasa, Horikawa Etsuo
J Aging Phys Act. 2020 Jun 30;28(6):943-951. doi: 10.1123/japa.2019-0463. Print 2020 Dec 1.
To investigate the relationship between leg skeletal muscle mass asymmetry and usual gait speed in older adults.
The subjects were 139 community-dwelling older adults. The asymmetry index was calculated using the leg skeletal muscle mass index (LSMI) values of both legs. The subjects were divided into "large" and "small" asymmetry groups based on the asymmetry index. The relationship between asymmetry and gait speed was analyzed using a linear regression model. The appendicular skeletal muscle mass index and LSMI were included as adjustment variables in the analysis.
The asymmetry index and having a "large" asymmetry were independently related to gait speed, even after adjusting for covariates such as appendicular skeletal muscle mass index and LSMI.
Leg skeletal muscle mass asymmetry was related to gait speed independently of the appendicular skeletal muscle mass index and LSMI values. A skeletal muscle mass evaluation among older adults should include an assessment of the total skeletal muscle mass and its asymmetry.
探讨老年人腿部骨骼肌质量不对称与日常步态速度之间的关系。
研究对象为139名社区居住的老年人。使用双腿的腿部骨骼肌质量指数（LSMI）值计算不对称指数。根据不对称指数将受试者分为“大”和“小”不对称组。使用线性回归模型分析不对称与步态速度之间的关系。分析中纳入附属骨骼肌质量指数和LSMI作为调整变量。
即使在调整了附属骨骼肌质量指数和LSMI等协变量后，不对称指数和存在“大”不对称仍与步态速度独立相关。
腿部骨骼肌质量不对称与步态速度相关，独立于附属骨骼肌质量指数和LSMI值。老年人的骨骼肌质量评估应包括对总骨骼肌质量及其不对称性的评估。
