Faculty of Education, University of Miyazaki, 1-1 Gakuen Kibanadai-nishi, Miyazaki, 889-2192, Japan.
Fukuoka University Institute for Physical Activity, 8-19-1 Nanakuma, Jonan-ku, Fukuoka, 814-0180, Japan.
J Physiol Sci. 2019 Nov;69(6):895-901. doi: 10.1007/s12576-019-00702-8. Epub 2019 Aug 6.
We investigated the effect of muscle damage and inflammation on electrical resistance and the body composition assessment by using bioimpedance spectroscopy (BIS). Twenty-two subjects completed 30 repetitions of maximal eccentric contractions of the elbow flexors with one arm. Whole-body resistance of extracellular and intracellular components (R and R, respectively) on the exercised and non-exercised sides were measured using BIS. Body composition was calculated from both sides of resistance at baseline and 96 h after exercise. R decreased only on the exercised side at 96 h after exercise (P < 0.05). Fat-free and fat mass values estimated from resistance on the exercised side were altered by 3.1% and - 15.6%, respectively, at 96 h after exercise (P < 0.05); those estimated from the non-exercised side were unaltered. Eccentric exercise-induced muscle damage and inflammation reduce R and induce non-negligible estimation error in the body composition assessment using BIS.
我们通过生物电阻抗谱（BIS）研究了肌肉损伤和炎症对电阻和身体成分评估的影响。22 名受试者用一只手臂完成了 30 次最大的肘屈肌离心收缩。使用 BIS 测量了运动侧和非运动侧细胞外和细胞内成分的全身电阻（R 和 R ）。在基线和运动后 96 小时测量了来自阻力的身体成分。仅在运动后 96 小时，运动侧的 R 降低（P<0.05）。运动侧电阻估计的去脂和脂肪质量值分别改变了 3.1%和-15.6%（P<0.05）；而从非运动侧估计的则没有改变。离心运动引起的肌肉损伤和炎症会降低 R，并在使用 BIS 进行身体成分评估时引起不可忽视的估计误差。
