Objectives The purpose of this study was to quantify the time-varying changes in pulmonary function with exposure to prolonged sitting. Methods Twenty-one healthy volunteers were recruited. The pulmonary function of all participants was measured three times in order to assess changes over time; pulmonary function was measured before sitting, after participants had been seated for 1 hour, and after they had been seated for 2 hours. A spirometer was used to measure pulmonary function. The recorded values were forced vital capacity, forced expiratory volume in 1 second, ratio of forced expiratory volume in 1 second to forced vital capacity (forced expiratory volume in 1 second/forced vital capacity), and peak expiratory flow. Results All measured values were significantly different before sitting and after 1 hour of sitting. There were also significant differences between all measurements taken before sitting and after 2 hours of sitting. However, the measurements taken after 1 hour and 2 hours of sitting did not significantly differ. Conclusion These findings suggest that significant changes in pulmonary function occur relatively quickly when human beings are seated.
Kang, K. W., Son, S. M., & Ko, Y. M. (2016). Time-varying Changes in Pulmonary Function with Exposure to Prolonged Sitting. Osong Public Health and Research Perspectives, 7(6), 382–384. https://doi.org/10.1016/j.phrp.2016.11.005