A study tracking 20,000 adults found that people who go to bed earlier are more physically active each day, underscoring the role of sleep timing—not just sleep duration—in energy and movement.
By yourNEWS Media Newsroom
People who go to bed earlier may be significantly more active during the day than those who stay up late, according to a large population study that adds new evidence to the growing focus on sleep timing as a key driver of health and behavior.
Researchers at Monash University analyzed sleep and activity patterns from roughly 20,000 adults and found that participants who typically fell asleep around 9 p.m. logged about 30 more minutes of daily physical activity than those who identified as late sleepers. The findings suggest that aligning sleep schedules with natural circadian rhythms may enhance daytime energy and movement.
The study challenges the idea that sleep quantity alone determines vitality. Instead, it points to when people sleep as a major factor shaping motivation, physical activity and overall well-being.
Circadian alignment and energy
Human sleep-wake cycles are governed by circadian rhythms that regulate hormone release, metabolism and alertness across a 24-hour period. When sleep timing is misaligned—often due to late-night screen use, artificial lighting or social schedules—those rhythms can be disrupted.
Researchers say early sleepers benefit from synchronizing rest with natural light-dark cycles, which supports deeper sleep stages tied to physical repair and cognitive function. By contrast, late sleepers who must wake early for work or school may lose restorative sleep, including rapid eye movement (REM) sleep, which plays a role in mood regulation and learning.
Dr. Aaron Pinkhasov, chair of psychiatry at NYU Grossman Long Island School of Medicine, said sleep-wake preferences are partly biological.
“About 40 to 50 percent of our sleep-wake preference is inherited,” Pinkhasov said in interviews cited alongside the research. He noted that forcing people to function against their natural chronotype can contribute to fatigue and reduced performance.
Health effects of chronic misalignment
Previous research has linked long-term circadian disruption to higher risks of anxiety, depression, metabolic disorders and Type 2 diabetes. Night owls, in particular, may be vulnerable when societal schedules favor early start times, creating what sleep researchers call “social jet lag.”
Dr. Nissa Keyashian, a California-based psychiatrist, has said that rigid work and school schedules can exacerbate sleep problems rather than resolve them, especially for individuals whose biology favors later sleep.
Transitioning to an earlier schedule
For people who want or need to adopt an earlier bedtime, sleep specialists recommend gradual adjustments rather than abrupt changes. Common guidance includes shifting wake times in small increments, increasing exposure to morning light, maintaining consistent sleep schedules across weekdays and weekends, and reducing exposure to bright screens before bed.
Consistency, experts say, is critical. Large swings in sleep timing—such as sleeping in on weekends—can undermine circadian stability and make weekday fatigue worse.
Broader implications
The Monash University findings add to ongoing discussions about whether modern work and school schedules adequately reflect biological diversity in sleep patterns. While early bedtimes appear to support higher daily activity for many people, researchers emphasize that individual differences matter.
The study’s authors and outside experts agree that optimizing sleep timing—alongside sufficient sleep duration—may be a practical way to improve energy levels and encourage more physical activity without additional interventions.
As evidence continues to accumulate, scientists say the focus of sleep health is shifting from simply getting enough hours of rest to understanding how sleep timing interacts with biology, behavior and daily performance.
Watch and learn 12 tricks to getting a better sleep.
This video is from Healing the Body channel on Brighteon.com.
Source: Natural News
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