To investigate the associations between different moderate to vigorous physical activity (MVPA) levels and the risk of low back disorders (LBDs), dorsal disorders (DDs), and cervical disorders (CDs).
To examine the dose-response relationship between physical activity (PA) and all-cause and cardiovascular disease (CVD) mortality, specifically among older adults.
To examine the optimal range of steps for an individual based on the dose-response relationship of the number of steps taken with disability incidence and all-cause mortality stratified by age and physical frailty.