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 (Re and Ri, 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. Re 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 Re and induce non-negligible estimation error in the body composition assessment using BIS.

中文翻译：

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离心运动后局部肌肉损伤和炎症对电阻的影响以及使用生物阻抗谱进行身体成分评估。


我们使用生物阻抗谱 (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 次肘屈肌最大偏心收缩。使用 BIS 测量运动侧和非运动侧细胞外和细胞内成分（分别为 Re 和 Ri）的全身阻力。根据基线和运动后 96 小时的阻力两侧计算身体成分。运动后 96 小时，仅运动侧 Re 下降（P < 0.05）。运动后 96 小时，根据运动侧阻力估算的去脂和脂肪量值分别改变了 3.1% 和 15.6%（P < 0.05）；未执行方的估计值没有改变。偏心运动引起的肌肉损伤和炎症会降低 Re，并在使用 BIS 进行身体成分评估时产生不可忽略的估计误差。