Riffe Joshua J, Stout Jeffrey R, Fukuda David H, Robinson Edward H, Miramonti Amelia A, Beyer Kyle S, Wang Ran, Church David D, Muddle Tyler W D, Hoffman Jay R
Institute of Exercise Physiology & Wellness, University of Central Florida, P.O. Box 161250, Orlando, Florida, 32816-1250, USA.
Department of Nutrition, Health, and Human Performance, Meredith College, Raleigh, North Carolina, USA.
Muscle Nerve. 2017 Mar;55(3):344-349. doi: 10.1002/mus.25255. Epub 2016 Dec 23.
The purpose of this study was to determine the validity of the maximal distance-electromyography (Dmax-EMG) method for estimating physical working capacity at fatigue threshold (PWC ).
Twenty-one men and women (age 22.9 ± 3.0 years) volunteered to perform 12 sessions of high-intensity interval training (HIIT) over 4 weeks. Before and after HIIT training, a graded exercise test (GXT) was used to estimate PWC using the Dmax method and the original (ORG) method.
There was a significant increase in PWC for both ORG (+10.6%) and Dmax (+12.1%) methods, but no significant difference in the change values between methods. Further, Bland-Altman analyses resulted in non-significant biases (ORG-Dmax) between methods at pre-HIIT (-6.4 ± 32.5 W; P > 0.05) and post-HIIT (-4.2 ± 33.1 W; P > 0.05).
The Dmax method is sensitive to training and is a valid method for estimating PWC in young men and women. Muscle Nerve 55: 344-349, 2017.
本研究旨在确定最大距离肌电图（Dmax-EMG）方法在评估疲劳阈值时的身体工作能力（PWC）的有效性。
21名男性和女性（年龄22.9±3.0岁）自愿参加了为期4周的12节高强度间歇训练（HIIT）课程。在HIIT训练前后，使用分级运动测试（GXT），通过Dmax方法和原始（ORG）方法来评估PWC。
ORG方法（+10.6%）和Dmax方法（+12.1%）的PWC均显著增加，但两种方法的变化值无显著差异。此外，Bland-Altman分析结果显示，在HIIT训练前（-6.4±32.5W；P>0.05）和HIIT训练后（-4.2±33.1W；P>0.05），两种方法之间的偏差均不显著（ORG-Dmax）。
Dmax方法对训练敏感，是评估年轻男性和女性PWC的有效方法。《肌肉与神经》55: 344-349, 2017年。
