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KMID : 1195020230190010017
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Archives of Orthopedic and Sports Physical Therapy
2023 Volume.19 No. 1 p.17 ~ p.24
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Differences of Vital Capacity according to Change of Cervical and Thoracic Posture while the Use of Smartphone in Adults
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An Kwang-Bin
Jeon Hye-Joo
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Abstract
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Purpose: In this study, we investigated changes in lung capacity based on cervical and thoracic posturesduring smartphone use in adults.
Methods: The study included 47 residents of Seongnam City (27 women and 20 men). Participants wereinstructed to perform the task in the normal sitting position without using a smartphone and in the sittingposition while performing a two-handed video watching task on a smartphone. An iPhone application(Goniometer Pro) was used to measure the cervical and thoracic flexion angles to quantitatively assessparticipants’ range of cervical and thoracic flexion, and a spirometer was used to measure the vital capacity(peak expiratory flow [PEF]) and forced expiratory volume in 1 s [FEV1]) in all participants.
Results: Cervical and thoracic flexion angles were significantly greater in the sitting position when using asmartphone than in the normal sitting position without using a smartphone (p<0.05). PEF and FEV1 valueswere significantly lower during sitting while using a smartphone than in the normal sitting position withoutusing a smartphone (p<0.05).
Conclusion: Our results suggest that frequent smartphone use while sitting may be a potential risk factor formusculoskeletal disorders and reduced lung function.
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KEYWORD
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Vital capacity, Peak expiratory flow, Smartphone, Cervical, Thoracic
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