대한물리치료과학회지 (Journal of Korean Physical Therapy Science)

  • 제30권3호
  • /
  • Pages.23-30
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  • 2023
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  • 2733-6441(pISSN)
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  • 2733-645X(eISSN)
대한물리치료과학회 (Korean Physical Therapy Science)
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스마트폰을 이용한 비디오 시청 시, 목뼈 굽힘 각도에 따른 앞쪽 머리 자세의 변화

Change of forward Head Posture in Cervical Flexion Positions while Watching Video on a Smartphone

  • 최보람 (신라대학교 보건복지대학 물리치료학과)
  • Bo ram Choi (Dept. of Physical Therapy, College of health and welfare, Silla University)
  • 투고 : 2022.12.12
  • 심사 : 2023.02.16
  • 발행 : 2023.09.30
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초록

Background: Flexion of cervical and lumbar joints is required when viewing a smartphone screen. Thus, these joints are overused, together with the surrounding joints and muscles. Long-term use of smartphones will cause changes in cervical and lumbar posture. The effect on forward head posture will vary, depending on the angle of cervical flexion start position in relation to the smartphone. This study investigated how forward head posture changes over time when using a smartphone at 20° and 40° cervical flexion start positions. Design: Cross-sectional study. Methods: Twenty-five subjects with a forward head posture angle of 35° or less participated in the study. A Forward Head Posture app on the participants' smartphones measured forward head posture 5 and 10 minutes after watching videos on their smartphones. Cervical range of motion was used to set a smartphone watching start posture of 20° and 40° of cervical flexion. Results: There was no significant difference in forward head posture, irrespective of cervical flexion start position, but the angle of forward head posture increased more at cervical flexion of 40° than at cervical flexion of 20°. There was no significant difference in what according to smartphone video viewing times, but the angle of forward head posture increased over time. Conclusion: An increase in forward head posture over time with smartphone usage poses a potential risk of neck and shoulder pain. Therefore, smartphone users should avoid prolonged screen time.

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