Lancet February 2026 Smartwatch-derived versus self-reported outcomes of physiological recovery after COVID-19, influenza, and group A streptococcus: a 2-year prospective cohort study

This Week In Medicine · Feb 9, 2026 · 14m

This research investigates the discrepancy between how patients feel and how their bodies actually function after an illness, using smartwatch datato track physiological markers like heart rate alongside self-reported symptoms. By monitoring thousands of individuals with COVID-19, influenza, and strep throat, the study found a significant digital recovery lag, where internal biological metrics remained abnormal long after participants felt better and resumed their daily routines. This phenomenon was especially pronounced in moderate-to-severe COVID-19 cases, where physical recovery took…