Department of Radiological Technology, Graduate School of Health Sciences, Okayama University, 2-5-1, Shikata-cho, Kita-ku, Okayama, Okayama, 700-8558, Japan.
Department of Rehabilitation Center, Kawasaki Medical School Hospital, 577, Matsushima, Kurashiki, Okayama, 701-0192, Japan.
J Physiol Sci. 2020 Oct 31;70(1):53. doi: 10.1186/s12576-020-00780-z.
We investigated the relationship between impedance parameters and skeletal muscle function in the lower extremities, as well as the effectiveness of impedance parameters in evaluating muscle quality. Lower extremity impedance of 19 healthy men (aged 23-31 years) measured using the direct segmental multi-frequency bioelectrical impedance analysis were arc-optimized using the Cole-Cole model, following which phase angle (PA), [Formula: see text], and β were estimated. Skeletal muscle function was assessed by muscle thickness, muscle intensity, and isometric knee extension force (IKEF). IKEF was positively correlated with PA (r = 0.58, p < 0.01) and β (r = 0.34, p < 0.05) was negatively correlated with [Formula: see text] (r = - 0.43, p < 0.01). Stepwise multiple regression analysis results revealed that PA, β, and [Formula: see text] were correlated with IKEF independently of muscle thickness. This study suggests that arc-optimized impedance parameters are effective for evaluating muscle quality and prediction of muscle strength.
我们研究了下肢阻抗参数与骨骼肌功能之间的关系，以及阻抗参数在评估肌肉质量方面的有效性。采用直接节段多频生物电阻抗分析测量了 19 名健康男性（年龄 23-31 岁）的下肢阻抗，使用科尔-科尔模型对其进行了圆弧优化，之后估算了相位角（PA）、[Formula: see text]和β。通过肌肉厚度、肌肉强度和等长膝关节伸展力（IKEF）评估骨骼肌功能。IKEF 与 PA 呈正相关（r=0.58，p<0.01），β与[Formula: see text]呈负相关（r=-0.43，p<0.01）。逐步多元回归分析结果表明，PA、β和[Formula: see text]与 IKEF 独立相关，与肌肉厚度无关。本研究表明，圆弧优化后的阻抗参数可有效评估肌肉质量和预测肌肉力量。
