McLean Hannah, Millis Darryl, Levine David
Department of Small Animal Clinical Sciences, University of Tennessee College of Veterinary Medicine, Knoxville, TN, United States.
Department of Physical Therapy, University of Tennessee at Chattanooga, Chattanooga, TN, United States.
Front Vet Sci. 2019 Jul 10;6:211. doi: 10.3389/fvets.2019.00211. eCollection 2019.
The objective of the study reported here was to evaluate the muscle activity patterns of the vastus lateralis (VL), biceps femoris (BF), and gluteus medius (GM) during stance, walking, trotting, and selected therapeutic exercises in clinically sound, healthy dogs. Our hypothesis was that the muscle activity during all exercises would differ from muscle activity at the stance. Surface electromyography of the selected muscles was performed during stance, walking, trotting, elevation of forelimbs on a platform, elevation of forelimbs on a platform with hindlimbs on an inflatable balance device, stepping up onto and over an obstacle, standing on a wobble board, dancing backwards, and wearing a leg weight at the walk and the trot. The maximal and mean muscle amplitude (μV) reflecting activity during several motion cycles were compared among the exercises. Mean EMG amplitude of the BF was significantly higher in all exercises ( < 0.05) in comparison to stance. Mean EMG amplitude of the VL was significantly higher ( < 0.05) during walking, trotting, dancing backwards, stepping up and over an obstacle, and at a trot with a leg weight as compared to stance. Mean EMG amplitude of the GM was significantly higher ( < 0.05) during trotting, at a walk and a trot with a leg weight, standing on a wobble board, stepping up and over an obstacle, and dancing backwards when compared to stance. Of the studied exercises, dancing backwards increased the mean EMG amplitude of the BF and GM to the largest degree. Stepping up and over an obstacle increased the mean EMG amplitude of the VL to the largest degree. Compared to stance, the majority of therapeutic exercises examined increased muscle activity to varying degrees in the BF, VL, and GM. Our results may help clinicians to choose specific exercises to target specific muscles during conditioning, strengthening and rehabilitation.
本研究报告的目的是评估临床健康的犬在站立、行走、小跑以及特定治疗性运动过程中股外侧肌（VL）、股二头肌（BF）和臀中肌（GM）的肌肉活动模式。我们的假设是，所有运动过程中的肌肉活动与站立时的肌肉活动不同。在站立、行走、小跑、前肢在平台上抬起、前肢在平台上抬起且后肢置于充气平衡装置上、踏上并越过障碍物、站在摇摆板上、向后跳舞以及在行走和小跑时佩戴腿部重量等情况下，对选定肌肉进行表面肌电图检查。比较了几种运动周期中反映活动的最大肌肉振幅和平均肌肉振幅（μV）。与站立相比，BF在所有运动中的平均肌电图振幅均显著更高（<0.05）。与站立相比，VL在行走、小跑、向后跳舞、踏上并越过障碍物以及小跑时佩戴腿部重量时的平均肌电图振幅显著更高（<0.05）。与站立相比，GM在小跑、行走和小跑时佩戴腿部重量、站在摇摆板上、踏上并越过障碍物以及向后跳舞时的平均肌电图振幅显著更高（<0.05）。在研究的运动中，向后跳舞使BF和GM的平均肌电图振幅增加的程度最大。踏上并越过障碍物使VL的平均肌电图振幅增加的程度最大。与站立相比，所检查的大多数治疗性运动在不同程度上增加了BF、VL和GM的肌肉活动。我们的结果可能有助于临床医生在体能训练、强化和康复过程中选择针对特定肌肉的特定运动。
