Longitudinal Relationship Between Physical Activity Levels and Respiratory Function in Older Individuals : A Longitudinal Study

Abstract

Aging causes various physical changes, including decreased respiratory function characterized by decreased lung elasticity, reduced chest wall compliance, and weakened respiratory muscles. This study explored the longitudinal impact of daily physical activity (PA) on respiratory function in elderly individuals aged ≥50 years in England. Using data from Waves 2 (2004–2005), 4 (2008–2009), and 6 (2012–2013), we examined the influence of different levels of PA on forced expiratory volume (FEV), forced vital capacity (FVC), and other respiratory measures. Participants were classified based on self-reported PA into three categories; “hard” (vigorous activity at least 1–3 times monthly), “middle” (moderate activity 1–3 times monthly), and “nothing” (no PA). The inclusion criteria required participants to be ≥50 years and to have valid respiratory measures. The exclusion criterion was the presence of significant respiratory or cardiovascular disease at baseline. We applied the Sequential Doubly Robust Estimator and SuperLearner ensemble methods in the analysis using inverse probability weighting to address follow up bias and found that vigorous PA significantly reduced the risk of FVC by 4.10-fold compared with no exercise. In addition, vigorous exercise was associated with a 0.63-fold reduction in the risk of restrictive ventilation disorders while moderate exercise approached significance for FVC (p = 0.08). No significant effects were found with obstructive ventilation impairment (FEV). Overall, vigorous PA appears to be crucial for maintaining respiratory function in older individuals, highlighting the importance of regular exercise in preventing respiratory decline and potentially extending a healthy lifespan. These results underscore the need to promote regular PA to improve quality of life and reduce the risk of respiratory disease.