pISSN 2288-6982
eISSN 2288-7105



Original Article

Phys. Ther. Korea 2021; 28(2): 101-107

Published online May 20, 2021

© Korean Research Society of Physical Therapy

유도된 감정변화가 위팔두갈래근의 근활성도에 미치는 영향

양상원1,2, 신유미1,3, 김수진1

1전주대학교 물리치료학과, 2고도일병원 도수치료실, 3국립재활원 재활보조기술연구과

Effects of Induced Emotional Changes on Bicep Brachii Muscle Activity

Sangwon Yang1,2 , BPT, Yumi Shin1,3 , PT, MSc, Sujin Kim1 , PT, PhD

1Department of Physical Therapy, Jeonju University, Jeonju, 2Department of Physical Therapy, Godoil Hospital, Seoul, 3Department of Rehabilitative Assistive Technology, National Rehabilitation Center, Seoul, Korea

Correspondence to: Sujin Kim

Received: April 7, 2021; Revised: April 21, 2021; Accepted: April 22, 2021


Background: Studies suggest that induced emotional changes can affect the sensory-motor system involved in the practice of muscle activity and movement in physical aspects. Previous studies have shown focused on effects just feedback on muscle activity associated with emotions but rarely have focused induced emotional change on gross motor function such as muscle activity.
Objects: The purpose of this study was to compare biceps activity and emotion that before and after viewing a video was induced positive or negative emotion.
Methods: The study enrolled 34 healthy male and female who scored at normal points on the Center for Epidermiological Studies-Depression Scale. The study measured over two weeks, showing subjects pleasant and sad videos one by one in a week. We performed to measure the biceps brachii activity which is maximal voluntary isometric contraction (MVIC) and the visual analog mood scale (VAMS) scores before and after one week. The significance level was set to α = 0.05.
Results: There was no significant difference in muscle activity of the biceps brachii before and after each video was viewed (p > 0.05). However, the visual analogue mood scale showed an increase in VAMS after viewing each video (p < 0.05).
Conclusion: We figured out induced emotional changes are cause actual emotional changes but there are no differences in muscle activity. In this research, watching the video with a short time looks like insufficient to change muscle activity. Nevertheless, there might be different when we check various muscles with sufficient time for viewing the video. Further study is needed to measure a variety of muscles with more time for viewing the video.

Keywords: Arm muscles, Electromyogram, Emotions, Muscle strength