Journal of the Korean Society of Physical Medicine (대한물리의학회지)

The Korean Society of Physical Medicine (대한물리의학회)
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Effect of Smart-phone Use According to Types of Carrying a Bag on Muscle Characteristics and Balance Ability in Adults in Their 20S with Chronic Ankle Instability

가방 착용 방향에 따른 스마트폰의 사용이 만성 발목 불안정성을 가진 20대 성인의 근육 특성과 균형 능력에 미치는 영향

  • Beom-Cheol Jeong (Rehabilitation Center, SG Samsung Jo-Eun Hospital) ;
  • Jae-Ha Kim (Department of Physical Therapy, Shinsung University) ;
  • Kyung-Tae Yoo (Department of Physical Therapy, Namseoul University)
  • 정범철 (SG삼성조은병원 재활치료센터) ;
  • 김재하 (신성대학교 물리치료과) ;
  • 유경태 (남서울대학교 물리치료학과)
  • Received : 2023.01.23
  • Accepted : 2023.02.23
  • Published : 2023.05.31
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Abstract

PURPOSE: This study examined the effect of using a smartphone according to the direction of wearing a bag on muscle characteristics and balance ability in adults in their 20s with chronic ankle instability. METHODS: Twelve people with chronic ankle instability were examined for three weeks. The types of carrying a bag were classified into three conditions: to the right, to the left, and on both sides. The muscle characteristics and balance ability were measured and analyzed. The one-way ANOVA was used to obtain a difference between conditions. RESULTS: A significant difference in the muscle tone of medial gastrocnemius was observed between the dominant group and the non-dominant group. The muscle tone and stiffness of the peroneus longus decreased significantly after walking with a smartphone and carrying a bag. The maximum slope of the forward and reverse directions increased and decreased significantly, respectively, after walking with a smartphone and carrying a bag on both sides. CONCLUSION: In this study, muscle fatigue causes a decrease in muscle tone and stiffness with chronic ankle instability when carrying a heavy back while walking, and there were asymmetric changes in the balance ability. Therefore, adults with chronic ankle instability should carefully avoid carrying a heavy bag for extended times, irrespective of the style or type of the bag.

Keywords

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