Starting and Keeping an Exercise Habit Significantly Boosts Sleep Quality
A large Japanese cohort study of over 700,000 adults found that starting and maintaining a regular exercise habit was strongly linked to improved perceived sleep restfulness. People who began exercising were 37% more likely to report better sleep quality, while those who kept up their exercise routine were 23% more likely to feel rested. Importantly, stopping exercise was associated with reduced sleep restfulness. General daily physical activity, like walking to work, did not show the same consistent benefits. The findings suggest that structured, intentional exercise—not just movement throughout the day—is what drives meaningful improvements in how refreshed people feel after sleep, making exercise habit formation a practical, low-cost sleep intervention.