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Lee and Lim: Muscle Activities of the Brachioradialis and Extensor Carpi Radialis Longus According to the Type of Backhand Stroke in Badminton
Clinical Article

Korean J Sports Med 2020;38(1):37-42.

Published online: 20 January 2020

DOI: https://doi.org/10.5763/kjsm.2020.38.1.37

Muscle Activities of the Brachioradialis and Extensor Carpi Radialis Longus According to the Type of Backhand Stroke in Badminton

Gun-Hee Lee, Bee-Oh Lim

Department of Physical Education, Chung-Ang University, Seoul, Korea

Correspondence: Bee-Oh Lim Department of Physical Education, Chung-Ang University, 84 Heukseok-ro, Dongjak-gu, Seoul 06974, Korea Tel: +82-2-820-5121, Fax: +82-2-812-2729 E-mail: bolim@cau.ac.kr

Received 20 December 2019       Revised 25 February 2020       Accepted 25 February 2020

Copyright © 2020 The Korean Society of Sports Medicine

This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Purpose

The purpose of this study was to investigate the muscle activities of the brachioradialis and extensor carpi radialis longus according to the type of backhand stroke in badminton.

Methods

To measure the muscle activities, we used electromyography (EMG) equipment to measure EMG values by performing maximal voluntary contraction (MVC) of the forearm muscles, which depends on the type of backhand stroke. With these values, the %maximum voluntary isometric contraction values were obtained. The data were calculated using SPSS ver. 21.0 and one-way repeated measures analysis of variance with a post-hoc least significant difference test.

Results

In this study, the backhand clear achieved higher maximum muscle activity values than those by the backhand push, under clear, and drive in the brachioradialis. The backhand smash achieved higher maximum muscle activity values than those by the backhand push in the extensor carpi radialis longus.

Conclusion

The backhand clear is associated with a higher injury rate than those associated with the backhand push, under clear, and drive. The backhand smash is associated with a higher rate of the occurrence of tennis elbow than that associated with the backhand push. To prevent injuries, it is considered that the forearm's strength, stretching before and after exercise, and sufficient time to rest are important.

Keywords: Badminton, Electromyography, Stroke, Tennis elbow

References

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Fig. 1.
Electrode attachment site of brachioradialis (A) and extensor carpi radialis longus (B).
kjsm-38-37f1.tif
Table 1.
Brachioradialis maximum muscle activities according to the type of backhand stroke (unit: %MVIC)
Push Under clear Drive High clear Smash F p-value∗  
45.60±8.41 46.16±8.88 44.46±16.65 72.14±8.93 61.83±17.44 6.623 0.001 d＞a,b,c

Values are presented as mean±standard deviation.

MVIC: maximum voluntary isometric contraction, a: push, b: under clear, c: drive, d: high clear.

∗ p＜0.05.

Table 2.
Extensor carpi radialis longus maximum muscle activities according to the type of backhand stroke (unit: %MVIC)
Push Under clear Drive High clear Smash F p∗  
37.93±8.93 39.91±12.07 44.36±9.20 48.01±14.23 56.81±14.03 2.765 0.046 e＞a

Values are presented as mean±standard deviation.

MVIC: maximum voluntary isometric contraction, a: push, e: smash.

∗ p＜0.05.

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