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Large Wearables Study Finds Sleep Drives Next-Day Activity

An analysis of more than 28 million device-tracked days shows low adherence to paired health targets, pointing to rest as the most practical lever to increase movement.

Overview

  • Fewer than 13% of people consistently met common benchmarks of 7–9 hours of sleep and roughly 8,000 daily steps.
  • Sleep quality and duration predicted higher step counts the following day more strongly than daily steps predicted that night’s rest.
  • About 17% averaged under seven hours of sleep and fewer than 5,000 steps, a combination linked in prior research to higher risks of chronic disease and mental-health problems.
  • The dataset covered over 70,000 participants across roughly 3.5 years, totaling more than 28 million person-days from consumer health devices.
  • Study authors recommend prioritizing better rest—such as consistent bedtimes and reduced pre-sleep screen time—to help increase daily physical activity.