The effect of smartphone usage time on posture and respiratory function

• Published in: Journal of Physical Therapy Science Vol. 28; no. 1; pp. 186 - 189
• Main Authors: Lee, Do Youn, Kang, Kyung Woo, Lee, Na Kyung, Jung, Sang In, Kim, Kyoung
• Format: Journal Article
• Language: English
• Published: Japan The Society of Physical Therapy Science 01.01.2016
• Subjects: Original; Posture; Respiratory function; Smartphone; Smartphone; Respiratory function; Posture
• ISSN: 0915-5287; 2187-5626
• DOI: 10.1589/jpts.28.186

[Purpose] The aim of this study was to evaluate the changes in posture and respiratory functions depending on the duration of smartphone usage. [Subjects and Methods] Participants were randomly allocated to 2 groups: group 1 (subjects who used smartphones for <4 hours/day, n=25) and group 2 (subjects who used smartphones for >4 hours/day, n=25). The craniovertebral angles of all participants were measured and scapular indices were calculated to assess the change in posture and forced vital capacity, forced expiratory volume in 1 second, the ratio of forced expiratory volume in 1 second to forced vital capacity, and peak expiratory flow were measured to assess changes in respiratory function. [Results] There were significant differences in the craniovertebral angle, scapular index, and peak expiratory flow depending on the duration of smartphone usage. [Conclusion] The result of this study showed that prolonged use of smartphones could negatively affect both, posture and respiratory function.