Headquarters of Avanzar Co., Ltd., 506-1 Higashifutami, Futami-Town, Akashi, Hyogo, 674-0092, Japan.
Department of Physical Medicine and Rehabilitation, Kansai Medical University, 2-5-1 Shin-Machi, Hirakata, Osaka, 573-1136, Japan.
J Med Ultrason (2001). 2023 Apr;50(2):221-228. doi: 10.1007/s10396-022-01275-7. Epub 2023 Jan 10.
In this study, we examined the association among total muscle mass, regional muscle mass, muscle quality, and various types of physical performance in community-dwelling older adults.
This study included 195 community-dwelling older adults (61 males and 134 females). The muscle thickness and echo intensity of the quadriceps femoris and triceps surae were measured using ultrasound, and the skeletal muscle mass index was evaluated using bioelectrical impedance analysis. Physical performance was measured using the 30-s standing test (CS30), Timed up-and-go test (TUG), 10-m maximum walking speed (10MWT), vertical jump test (VJT), and grip strength.
Partial correlation analysis after controlling for age, sex, and body mass index showed that CS30 was significantly correlated with muscle thickness and echo intensity of the quadriceps femoris. The TUG and VJT were significantly correlated with muscle thickness of the triceps surae, and grip strength was significantly correlated with muscle thickness of the triceps surae and skeletal muscle mass index. Stepwise multiple regression analyses indicated that the echo intensity of the quadriceps femoris was a significant predictor of CS30, and the muscle thickness of the triceps surae was a significant predictor of TUG, VJT, and grip strength, whereas the skeletal muscle mass index was not a significant predictor of any physical performance test.
Our results suggest that regional muscle mass and quality are more important than skeletal muscle mass index for predicting physical performance.
本研究旨在探讨社区老年人的总肌肉量、区域肌肉量、肌肉质量与各种类型身体机能表现之间的关系。
本研究纳入了 195 名社区老年人（61 名男性和 134 名女性）。使用超声测量股四头肌和比目鱼肌的肌肉厚度和回声强度，并通过生物电阻抗分析评估骨骼肌质量指数。使用 30 秒站立测试（CS30）、计时起立行走测试（TUG）、10 米最大步行速度（10MWT）、垂直跳跃测试（VJT）和握力来测量身体机能表现。
在控制年龄、性别和体重指数后进行偏相关分析显示，CS30 与股四头肌的肌肉厚度和回声强度显著相关。TUG 和 VJT 与比目鱼肌的肌肉厚度显著相关，握力与比目鱼肌的肌肉厚度和骨骼肌质量指数显著相关。逐步多元回归分析表明，股四头肌的回声强度是 CS30 的显著预测因子，比目鱼肌的肌肉厚度是 TUG、VJT 和握力的显著预测因子，而骨骼肌质量指数不是任何身体机能测试的显著预测因子。
我们的结果表明，与骨骼肌质量指数相比，区域肌肉量和质量对于预测身体机能表现更为重要。
