Department of Physiotherapy, School of Primary and Allied Health Care, Faculty of Medicine, Nursing and Health Sciences, Monash University, Victoria, Australia.
Department of Physiotherapy, School of Primary and Allied Health Care, Faculty of Medicine, Nursing and Health Sciences, Monash University, Victoria, Australia.
J Electromyogr Kinesiol. 2021 Dec;61:102603. doi: 10.1016/j.jelekin.2021.102603. Epub 2021 Sep 21.
This study aimed to determine test-retest reliability of ankle plantar flexor neuromuscular properties in healthy people to improve understanding of additional measurement and analysis procedures that may be used in outcome assessment. Ten healthy participants (age 29.60 ± 5.36 years) volunteered. Isometric torque, rate of torque development (RTD), rate of electromyography rise (RER), impulse, electromechanical delay (EMD), torque steadiness, and torque sensing were obtained during two testing sessions 60 min apart. ICC values ranged from 0.81 to 0.99, indicating good to excellent test-retest reliability. Lower bands of the 95% CIs were all above 0.75 apart from the early phase measures (≤50 ms) derived from explosive torque-time and EMG-time curves, which were between 0.32 and 0.73, indicating poor to moderate reliability. Heteroscedasticity was observed for RTD, impulse, and EMD. LOA as a function of the mean (X̅) for these measures ranged from mean ± 0.25X̅ to ± 0.68X̅. EMD showed excellent reliability (ICC = 0.90; 95% CI [0.63, 0.98]). Torque sensing and torque steadiness showed good reliability (0.81 ≤ ICC ≤ 0.89). Thus, ankle plantar flexor neuromuscular properties showed good to excellent test-retest reliability. However, reliability of measures in the early phase of muscle contraction were consistently lower than the late phase.
本研究旨在确定健康人群中踝关节跖屈肌神经肌肉特性的重测信度，以增进对可能用于结局评估的额外测量和分析程序的理解。10 名健康参与者（年龄 29.60 ± 5.36 岁）自愿参加。在两次相隔 60 分钟的测试中，获得了等长扭矩、扭矩发展率（RTD）、肌电图上升率（RER）、脉冲、机电延迟（EMD）、扭矩稳定性和扭矩感知。ICC 值范围为 0.81 至 0.99，表明重测信度良好至优秀。95%CI 的较低区间均高于 0.75，除了源于爆发力扭矩-时间和肌电图-时间曲线的早期阶段测量值（≤50ms），其介于 0.32 和 0.73 之间，表明可靠性为差至中等。RTD、脉冲和 EMD 存在异方差性。这些措施的 LOA 作为均值（X̅）的函数，范围从均值 ± 0.25X̅ 到 ± 0.68X̅。EMD 显示出极好的可靠性（ICC=0.90；95%CI[0.63,0.98]）。扭矩感知和扭矩稳定性显示出良好的可靠性（0.81≤ICC≤0.89）。因此，踝关节跖屈肌神经肌肉特性表现出良好至优秀的重测信度。然而，肌肉收缩早期阶段的测量值可靠性始终低于后期阶段。
