Department of Biomechanics and Sports Injuries, Faculty of Physical Education and Sports Sciences, Kharazmi University, Tehran, Iran.
Department of Sports Biomechanics and Motor Control, Faculty of Physical Education and Sports Sciences, Mazandaran University, Babolsar, Iran.
Sci Rep. 2022 Aug 4;12(1):13451. doi: 10.1038/s41598-022-17849-x.
This study aimed to investigate how facilitatory and inhibitory KT of the Vastus Medialis affected the activation and the fatigue indices of VM, Vastus Lateralis (VL) and Rectus Femoris (RF) throughout a dynamic fatigue protocol. Seventeen collegiate athletes (Ten males, seven females, age: 24.76 ± 3.99 years, height: 1.73 ± 0.10 m, mass: 68.11 ± 8.54 kg) voluntarily participated in four dynamic fatigue protocol sessions in which no-tape (control condition), inhibitory, facilitatory and sham KTs were applied to the Vastus Medialis in each session. The protocol included 100 dynamic maximum concentric knee extensions at 90°/s using an isokinetic dynamometry device. The knee extensor muscle activities were recorded using wireless surface electromyography. The average muscle activity (Root mean square) during the first three repetitions and the repetitions number of 51-100, respectively, were used to calculate the before and after exhaustion muscle activity. Furthermore, median frequency slope during all repetitions was reported as the fatigue rate of muscles during different KT conditions and for the control condition (no-tape). The results showed neither muscle activation (significance for the main effect of KT; VM = 0.82, VL = 0.72, RF = 0.19) nor fatigue rate (significance for the main effect of KT; VM = 0.11 VL = 0.71, RF = 0.53) of the superficial knee extensor muscles were affected in all four conditions. These findings suggest that the direction of KT cannot reduce, enhance muscle activity or cause changes in muscle exhaustion. Future studies should investigate the generalizability of current findings to other populations.
本研究旨在探究股直肌的促进性和抑制性 KT 如何影响 VM、Vastus Lateralis（VL）和 Rectus Femoris（RF）在动态疲劳协议中的激活和疲劳指数。17 名大学生运动员（10 名男性，7 名女性，年龄：24.76±3.99 岁，身高：1.73±0.10 米，体重：68.11±8.54 公斤）自愿参加了四个动态疲劳协议，在每个协议中，股直肌施加无胶带（对照条件）、抑制性、促进性和假 KT。协议包括在 90°/s 的等速测力设备上进行 100 次最大动态向心膝伸展。使用无线表面肌电图记录膝关节伸肌的肌肉活动。分别使用前三组重复的平均肌肉活动（均方根）和 51-100 次重复的肌肉活动计算疲劳前和疲劳后的肌肉活动。此外，在不同 KT 条件和对照条件（无胶带）下，报告所有重复的中频斜率作为肌肉疲劳率。结果表明，在所有四种条件下，浅层膝关节伸肌的肌肉激活（KT 主要效应的显著性；VM=0.82，VL=0.72，RF=0.19）和疲劳率（KT 主要效应的显著性；VM=0.11 VL=0.71，RF=0.53）均不受影响。这些发现表明，KT 的方向不能减少、增强肌肉活动或导致肌肉疲劳的变化。未来的研究应该调查当前发现对其他人群的普遍性。
