USF Muscle Lab, Exercise Science Program, University of South Florida, Tampa, FL, USA.
J Musculoskelet Neuronal Interact. 2022 Sep 1;22(3):336-345.
To examine changes in muscle thickness (MT), soreness (SOR), and isometric torque (ISO) following exercise with pulsed direct current (Neubie) or traditional high-load (TRAD) exercise.
Thirty-two participants had SOR, MT, and ISO measured before, immediately after, and 24 and 48h following TRAD and Neubie. Rating of perceived exertion (RPE) and discomfort were also measured. Results are displayed as means(SD).
For MT, there was a condition x time interaction (p<0.001). For Neubie, MT increased pre [3.7(0.7)cm] to post [3.9(0.8) cm, p<0.001] and remained elevated at 24h. For TRAD, MT increased pre [3.7(0.6)cm] to post [4.0 (0.7)cm, p<0.001] and remained up to 48h. Greater values were observed for TRAD post-exercise. For ISO, both conditions decreased up to 48h. TRAD demonstrated a greater change post exercise (p<0.001). For SOR, both conditions increased up to 48h. Neubie demonstrated greater SOR at 48h (p=0.007). RPE was higher for all sets in TRAD [Mean across sets=16.0(1.9) vs. 13.5(2), p<0.001]. Discomfort was higher in all sets for Neubie [Mean across sets=5.8(1.5)vs. 4.5(2.0), p<0.05].
Both conditions showed increased SOR, and decreased ISO for up to 48h, with MT increased for up to 24h. MT remained elevated in TRAD at 48h. Neubie training might be effective for individuals who are looking to experience lower RPE responses during exercise.
研究脉冲直流电（Neubie）或传统高负荷（TRAD）运动后肌肉厚度（MT）、酸痛（SOR）和等长扭矩（ISO）的变化。
32 名参与者在接受 TRAD 和 Neubie 运动前、运动后即刻以及 24 和 48 小时后，对 SOR、MT 和 ISO 进行了测量。还测量了主观用力感觉（RPE）和不适。结果以平均值（SD）表示。
对于 MT，存在条件 x 时间的交互作用（p<0.001）。对于 Neubie，MT 从预测量[3.7(0.7)cm]增加到后测量[3.9(0.8)cm，p<0.001]，并在 24 小时内保持升高。对于 TRAD，MT 从预测量[3.7(0.6)cm]增加到后测量[4.0(0.7)cm，p<0.001]，并持续到 48 小时。运动后观察到 TRAD 的数值更高。对于 ISO，两种情况都在 48 小时内下降。TRAD 在运动后显示出更大的变化（p<0.001）。对于 SOR，两种情况在 48 小时内都增加。Neubie 在 48 小时时显示出更大的 SOR（p=0.007）。TRAD 中所有组的 RPE 更高[所有组的平均值=16.0(1.9)比 13.5(2)，p<0.001]。Neubie 中所有组的不适都更高[所有组的平均值=5.8(1.5)比 4.5(2.0)，p<0.05]。
两种情况均显示出 SOR 增加和 ISO 减少长达 48 小时，MT 增加长达 24 小时。TRAD 在 48 小时时 MT 仍升高。对于希望在运动期间体验到更低 RPE 反应的个体，Neubie 训练可能是有效的。
