Background
Cardiorespiratory fitness (CRF) has long been recognized as a key determinant of cardiovascular health and longevity. However, its broader impact on healthy aging—defined as the ability to maintain functional independence and avoid major chronic diseases—remains less well-characterized. The study by Meernik et al. addresses this gap by examining how midlife CRF influences healthspan, disease burden, and lifespan in a large cohort of initially healthy adults.
