Graduate School of Sport Sciences, Waseda University, Japan.
Arch Gerontol Geriatr. 2012 Sep-Oct;55(2):e26-30. doi: 10.1016/j.archger.2012.03.007. Epub 2012 Apr 6.
The study investigated age-related changes in the thickness of the deep and superficial abdominal muscles of 103 healthy women who could walk independently The participants were classified into five age groups: young (n=26; 20-24 years), young adult (n=26; 25-44 years), middle-aged (n=16; 45-64 years), young-old (n=16; 65-74 years), and old-old (n=19; 75-85 years). The muscle thicknesses of the right rectus abdominis, external oblique, internal oblique, and transversus abdominis were measured using ultrasound imaging. The rectus abdominis was significantly thicker in the young group compared with the young adult, middle-aged, young-old, and old-old groups (p<0.05). The external oblique and internal oblique muscles were significantly thicker in the young group compared with the middle-aged, young-old, and old-old groups (p<0.05). However, there were no significant differences in the thickness of the transversus abdominis between groups. The results suggest that age-related muscle atrophy occurs from an early age in superficial abdominal muscles, such as rectus abdominis, and that age-related atrophy is less in deep abdominal muscles such as the transversus abdominis.
本研究调查了 103 名能够独立行走的健康女性的深层和浅层腹部肌肉厚度随年龄的变化。参与者被分为五个年龄组：年轻组（n=26；20-24 岁）、年轻成人组（n=26；25-44 岁）、中年组（n=16；45-64 岁）、年轻老年组（n=16；65-74 岁）和老年老年组（n=19；75-85 岁）。使用超声成像测量右侧腹直肌、腹外斜肌、腹内斜肌和腹横肌的肌肉厚度。与年轻成人组、中年组、年轻老年组和老年老年组相比，年轻组的腹直肌明显更厚（p<0.05）。与中年组、年轻老年组和老年老年组相比，年轻组的腹外斜肌和腹内斜肌明显更厚（p<0.05）。然而，各组间腹横肌的厚度无显著差异。研究结果表明，浅层腹部肌肉（如腹直肌）的年龄相关性肌肉萎缩从年轻时就开始发生，而深层腹部肌肉（如腹横肌）的年龄相关性萎缩则较少。
