Kanehisa Hiroaki, Miyatani Masae, Azuma Kazumi, Kuno Shinya, Fukunaga Tetsuo
Department of Life Sciences (Sports Sciences), University of Tokyo, Komaba 3-8-1, Meguro-ku, 153-8902 Tokyo, Japan.
Eur J Appl Physiol. 2004 May;91(5-6):534-7. doi: 10.1007/s00421-003-1034-9. Epub 2004 Jan 21.
This study aimed to investigate the influences of age and sex on the thickness of the rectus abdominis muscle and subcutaneous fat at the abdomen. The two tissue thickness values were determined using ultrasonography in a total of 194 young (20-29 years) and elderly (70-79 years) persons of both genders. In both sexes, the elderly groups showed significantly thinner muscle and thicker fat than the younger groups. The percentage of the mean value of subcutaneous fat thickness in the elderly group compared to that in the younger group was higher in the women (176%) than in the men (128%), but the corresponding value of muscle thickness was similar between men (68%) and women (65%). In both generations, the women had significantly thinner muscle and thicker fat than the men. The percentage of the mean value of subcutaneous fat thickness in the women compared to that in the men was higher in the elderly group (169%) than in the younger group (123%), but the corresponding value of muscle thickness was similar between the younger (80%) and elderly (77%) groups. In every group, subcutaneous fat thickness significantly correlated with waist circumference, but muscle thickness did not. The findings here indicated that: (1). aging was associated with a decrease of muscle thickness and an increase of subcutaneous fat at the abdomen in men and women, with a similar relative loss of muscle thickness in both genders and a greater increase of subcutaneous fat thickness in women than in men, and (2). subcutaneous fat rather than muscle thickness reflected waist circumference, regardless of age and gender.
本研究旨在调查年龄和性别对腹直肌厚度以及腹部皮下脂肪厚度的影响。使用超声检查测定了总共194名年龄在20至29岁之间的年轻人和70至79岁之间的老年人（男女均有）的这两种组织厚度值。在男女两性中，老年组的肌肉厚度均显著低于年轻组，而脂肪厚度则显著高于年轻组。老年组皮下脂肪厚度平均值与年轻组相比的百分比，女性（176%）高于男性（128%），但肌肉厚度的相应值在男性（68%）和女性（65%）之间相似。在两代人中，女性的肌肉厚度均显著低于男性，而脂肪厚度则显著高于男性。老年组女性皮下脂肪厚度平均值与男性相比的百分比（169%）高于年轻组（123%），但肌肉厚度的相应值在年轻组（80%）和老年组（77%）之间相似。在每个组中，皮下脂肪厚度均与腰围显著相关，但肌肉厚度与腰围无关。此处的研究结果表明：（1）. 衰老与男性和女性腹部肌肉厚度的降低以及皮下脂肪的增加有关，两性肌肉厚度的相对损失相似，且女性皮下脂肪厚度的增加幅度大于男性；（2）. 无论年龄和性别，皮下脂肪而非肌肉厚度反映了腰围。
