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A Comparison of EMG Activity for Long and Lateral Heads of Triceps Brachii Muscles According to Exercise and Forearm Positions During Triceps Strengthening Exercises  

Kim, Si-Hyun (Dept of Rehabilitation Therapy, The Graduate School, Yonsei University)
Lee, Won-Hwee (Dept of Rehabilitation Therapy, The Graduate School, Yonsei University)
Ha, Sung-Min (Dept of Rehabilitation Therapy, The Graduate School, Yonsei University)
Park, Kyue-Nam (Dept of Rehabilitation Therapy, The Graduate School, Yonsei University)
Kwon, Oh-Yun (Dept of Physical Therapy, College of Health Science, Yonsei University, Dept. of Ergonomic Therapy, The Graduate School of Health and Environment, Yonsei University)
Publication Information
Physical Therapy Korea / v.18, no.1, 2011 , pp. 28-36 More about this Journal
The aim of this study was to compare electromyography activity for long and lateral heads of triceps brachii muscle according to forearm positions during different triceps strengthening exercises. The muscle activities for long and lateral head of triceps brachii were measured by surface electromyography. Fifteen healthy volunteers participated for this study and performed elbow extension in three different elbow extension exercises (elbow extension in a supine position; EES, elbow extension with shoulder abduction at 90 degrees in a prone position; EESA, and elbow extension with one arm at the side of the trunk in a prone position; EESP) and forearm positions (supination, neutral, and pronation). A two-way repeated measures ANOVA was used to compare the effects of the exercise positions and forearm positions. The EMG activities of the long head of the triceps brachii increased significantly during EESP with forearm supination, whereas the activity of the lateral head of the triceps brachii increased significantly during EESA with the forearm in a neutral position (p<.05). The results of this study suggest that exercise positions and forearm positions should be considered for selectively strengthening the long and lateral heads of triceps brachii muscles.
Electromyography; Forearm position; Lateral head of triceps brachii muscle; Long head of triceps brachii muscle; Triceps strengthening exercise;
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