@article{ART003272304},
author={강승묵 and 최인서 and 홍진명 and 민서영 and Kwon, Hyeok-Gyu},
title={Effect of Muscle Activation of the Wrist and Shoulder Muscles According to the Forearm Support During Typing},
journal={Journal of the Korean Society of Physical Medicine},
issn={1975-311X},
year={2025},
volume={20},
number={4},
pages={75-84}
TY - JOUR
AU - 강승묵
AU - 최인서
AU - 홍진명
AU - 민서영
AU - Kwon, Hyeok-Gyu
TI - Effect of Muscle Activation of the Wrist and Shoulder Muscles According to the Forearm Support During Typing
JO - Journal of the Korean Society of Physical Medicine
PY - 2025
VL - 20
IS - 4
PB - The Korean Society of Physical Medicine
SP - 75
EP - 84
SN - 1975-311X
AB - PURPOSE: This study examined the muscle activities of the wrist and shoulder muscles according to the forearm supporting positions during typing using surface electromyography (EMG).
METHODS: Twenty-eight participants, including 14 females and 14 males in their twenties, were recruited. The study was conducted under three different conditions: 1) wrist support, 2) half forearm support, and 3) full forearm support. Each participant was asked to type under three different supporting conditions. Before starting the first condition, the reference voluntary contractions of the upper trapezius, anterior, posterior, and middle deltoids, and wrist extensor muscles were measured using surface EMG. The muscle activity was measured for three minutes in three sets for each condition, using surface EMG.
RESULTS: Regarding the upper trapezius, the muscle activity of full forearm support was significantly lower than that of wrist or half forearm support (p < .05). The muscle activity of the middle deltoid was significantly lower with full forearm support than that of wrist support (p < .05). For the posterior deltoid, the muscle activity of half forearm support was significantly lower than that of full forearm support (p < .05). The muscle activity of the extensor carpi radialis was significantly lower with half forearm support than with wrist or full forearm support (p < .05).
CONCLUSION: The forearm supporting conditions resulted in lower muscle activity with wrist support. Therefore, forearm support can reduce muscle fatigue.
KW - Deltoid; Display Terminal Syndrome;Extensor carpi radialis;Trapezius;Typing Position;Visual
DO -
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강승묵, 최인서, 홍진명, 민서영 and Kwon, Hyeok-Gyu. (2025). Effect of Muscle Activation of the Wrist and Shoulder Muscles According to the Forearm Support During Typing. Journal of the Korean Society of Physical Medicine, 20(4), 75-84.
강승묵, 최인서, 홍진명, 민서영 and Kwon, Hyeok-Gyu. 2025, "Effect of Muscle Activation of the Wrist and Shoulder Muscles According to the Forearm Support During Typing", Journal of the Korean Society of Physical Medicine, vol.20, no.4 pp.75-84.
강승묵, 최인서, 홍진명, 민서영, Kwon, Hyeok-Gyu "Effect of Muscle Activation of the Wrist and Shoulder Muscles According to the Forearm Support During Typing" Journal of the Korean Society of Physical Medicine 20.4 pp.75-84 (2025) : 75.
강승묵, 최인서, 홍진명, 민서영, Kwon, Hyeok-Gyu. Effect of Muscle Activation of the Wrist and Shoulder Muscles According to the Forearm Support During Typing. 2025; 20(4), 75-84.
강승묵, 최인서, 홍진명, 민서영 and Kwon, Hyeok-Gyu. "Effect of Muscle Activation of the Wrist and Shoulder Muscles According to the Forearm Support During Typing" Journal of the Korean Society of Physical Medicine 20, no.4 (2025) : 75-84.
강승묵; 최인서; 홍진명; 민서영; Kwon, Hyeok-Gyu. Effect of Muscle Activation of the Wrist and Shoulder Muscles According to the Forearm Support During Typing. Journal of the Korean Society of Physical Medicine, 20(4), 75-84.
강승묵; 최인서; 홍진명; 민서영; Kwon, Hyeok-Gyu. Effect of Muscle Activation of the Wrist and Shoulder Muscles According to the Forearm Support During Typing. Journal of the Korean Society of Physical Medicine. 2025; 20(4) 75-84.
강승묵, 최인서, 홍진명, 민서영, Kwon, Hyeok-Gyu. Effect of Muscle Activation of the Wrist and Shoulder Muscles According to the Forearm Support During Typing. 2025; 20(4), 75-84.
강승묵, 최인서, 홍진명, 민서영 and Kwon, Hyeok-Gyu. "Effect of Muscle Activation of the Wrist and Shoulder Muscles According to the Forearm Support During Typing" Journal of the Korean Society of Physical Medicine 20, no.4 (2025) : 75-84.
