Kitagawa Funa, Akima Hiroshi, Ishiguro-Tanaka Noriko
Graduate School of Education & Human Development, Nagoya University, Nagoya, Aichi, Japan.
Japan Society for the Promotion of Science (JSPS), Chiyoda, Tokyo, Japan.
PLoS One. 2025 Jan 6;20(1):e0312523. doi: 10.1371/journal.pone.0312523. eCollection 2025.
The present study examined factors associated with trunk skeletal muscle thickness (MT, an index for the amount of skeletal muscle) and echo intensity (EI, an index for the content of non-contractile tissue, such as intramuscular adipose tissue) in young Japanese men and women in consideration of habitual dietary intake. Healthy men (n = 26) and women (n = 24) aged 20 to 26 were enrolled. Trunk MT and EI were evaluated using ultrasound imaging at the height of the 3rd lumbar vertebra. In addition to morphological variables, brachial-ankle pulse wave velocity (baPWV) and blood properties (e.g., triglycerides, total cholesterol, and fasting blood glucose) were measured. Habitual dietary intake was also evaluated by a self-administered diet history questionnaire. The results obtained for young men revealed significant correlations between trunk MT/body mass1/3 and the percentages of energy from polyunsaturated fatty acids (rs = 0.476, p <0.05) and carbohydrates (rs = -0.402, p <0.05). Trunk EI significantly and positively correlated with the percentage of energy from saturated fatty acids (rs = 0.397, p <0.05). In young women, trunk EI showed a significant and positive correlation with baPWV (rs = 0.504, p <0.05). These results suggest that the effects of habitual dietary intake on trunk skeletal muscle differ between young men and women.
本研究在考虑习惯性饮食摄入的情况下，调查了日本年轻男性和女性躯干骨骼肌厚度（MT，骨骼肌量的指标）和回声强度（EI，非收缩性组织含量的指标，如肌内脂肪组织）相关的因素。纳入了20至26岁的健康男性（n = 26）和女性（n = 24）。在第三腰椎高度处使用超声成像评估躯干MT和EI。除了形态学变量外，还测量了臂踝脉搏波速度（baPWV）和血液特性（如甘油三酯、总胆固醇和空腹血糖）。习惯性饮食摄入也通过自行填写的饮食史问卷进行评估。年轻男性的结果显示，躯干MT/体重1/3与多不饱和脂肪酸能量百分比（rs = 0.476，p <0.05）和碳水化合物能量百分比（rs = -0.402，p <0.05）之间存在显著相关性。躯干EI与饱和脂肪酸能量百分比显著正相关（rs = 0.397，p <0.05）。在年轻女性中，躯干EI与baPWV呈显著正相关（rs = 0.504，p <0.05）。这些结果表明，习惯性饮食摄入对躯干骨骼肌的影响在年轻男性和女性之间存在差异。
