Early bedtimes are associated with more physical activity

A recent study led by Monash University has found that going to bed earlier than usual can have a positive impact on physical activity levels the following day. Published in the prestigious journal Proceedings of the National Academy of Sciences, the research looked at the relationship between sleep duration, sleep timing, and physical activity.

The study involved nearly 20,000 participants who wore a biometric device called WHOOP for a year, resulting in a wealth of data. By analyzing the data collected from the device, researchers were able to determine how sleep habits and nightly fluctuations in sleep affected physical activity levels the next day.

The results showed that individuals who went to bed earlier tended to be more physically active. For instance, those with a typical bedtime around 9 pm engaged in about 30 more minutes of moderate-to-vigorous physical activity each day compared to those who stayed up until 1 am. Even in comparison to individuals who went to bed at 11 pm, the average bedtime for the sample, the 9 pm sleepers recorded nearly 15 additional minutes of daily physical activity.

Lead author Dr. Josh Leota highlighted the implications of these findings, suggesting that individuals with later bedtimes may face challenges under conventional work schedules. He pointed out that social jetlag, poorer sleep quality, and increased daytime sleepiness resulting from late bedtimes can reduce motivation and opportunities for physical activity.

The study also found that individuals who went to bed earlier than usual but maintained their usual amount of sleep recorded the highest levels of physical activity the next day. This indicates that actively altering sleep timing can have a positive impact on physical activity levels.

Dr. Elise Facer-Childs, the senior author of the study, emphasized the strong relationship between sleep timing and physical activity. She highlighted the importance of understanding how these two essential behaviors are interconnected in everyday life and how promoting earlier bedtimes could lead to more active lifestyles.

The findings of the study were further validated in a separate study involving almost 6,000 participants from the All of Us Research Program, using Fitbit data. The results were consistent across diverse populations, highlighting the universal nature of the relationship between sleep timing and physical activity.

In conclusion, the study underscores the importance of considering both sleep timing and physical activity in promoting overall health. By encouraging earlier bedtimes, health campaigns could potentially foster more active lifestyles and improve individual and community health outcomes. This holistic approach recognizes the intricate connection between sleep and physical activity and offers valuable insights for public health initiatives.