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Abstract

Background: Inappropriately sized tennis racket grip is often cited in the popular media as a risk factor for overuse injuries about the forearm and elbow. Currently, a hand measurement technique developed by Nirschl is commonly used by tennis racket manufacturing companies as the method for determining a player's “recommended” grip size.

Hypothesis: Quarter-inch changes from that recommended by Nirschl in tennis racket grip size will have no significant effect on forearm muscle firing patterns.

Study Design: Controlled laboratory study.

Methods: Sixteen asymptomatic Division I and II collegiate tennis players performed single-handed backhand ground strokes with rackets of 3 different grip sizes (recommended measurement, undersized 1/4 in, and oversized 1/4 in). Fine-wire electromyography was used to measure muscle activity in extensor carpi radialis longus and brevis, extensor digitorum communis, flexor carpi radialis, and pronator teres. Repeated-measure analysis of variance was used for within-group comparisons, comparing different grips in specified phases for backhand ground strokes (P [.lessequal] .05).

Results: There were no significant differences in muscle activity between small, recommended, or big grips in any muscle tested.

Conclusion: Based on these findings, tennis racket grip size 1/4 in above or below Nirschl's recommended measurement does not significantly affect forearm muscle firing patterns.

Clinical Relevance: Alterations in tennis racket grip size within 1/4 in of Nirschl's recommended sizing do not have a significant effect on forearm muscle activity and therefore may not represent a significant risk factor for upper extremity cumulative trauma, such as lateral epicondylitis.

Keywords

tennis grip size forearm electromyographic (EMG) analysis

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The Effect of Tennis Racket Grip Size on Forearm Muscle Firing Patterns

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