Morning hourly activity variance

Morning hourly activity variance decreases frailty in humans (OR = 0.67 for 1 SD increase, p = 0.01).

“higher morning activity WS variance predicted better frailty scores among survivors (OR = 0.67 for 1 SD increase, p = 0.01)”

Humansamong survivors, adjusted for covariates5 yearsn = 584

The Mean and Variability of Morning Hour Activity Over 2-3 Days Predict 5-Year Mortality and Frailty Risk in a National Sample of Older Adults

Journal of the American Geriatrics Society·17 Sep 2026