The short answer
Regular exercise improves sleep modestly. A review of 66 studies found small benefits for how long and how deeply people slept and a moderate reduction in waking at night. Evening exercise doesn't harm sleep for most people, except possibly vigorous exercise that ends within about an hour of bed.
Moderate evidence
Trials point the same way but are small or few, or large long-term studies agree but cannot prove cause and effect. How we grade
On this page
What does the research show?
A 2015 review pooled 66 studies of exercise and sleep in adults.
- A single session of exercise had small benefits for total sleep time, time to fall asleep, sleep efficiency and deep sleep, and a moderate benefit for time spent awake in the night.
- Regular exercise over weeks had small benefits for total sleep and sleep efficiency, and moderate to large benefits for how well people rated their sleep.
Effects tended to be bigger in people who exercised more and in those who slept poorly to begin with. Most studies were small and short, and people couldn’t be blinded to whether they exercised, which is why we grade the evidence moderate.
Does evening exercise keep you up?
Probably not, for most people. A 2019 review of 23 studies in healthy adults compared sleep after evening exercise with sleep after no exercise. Evening exercise slightly increased deep sleep and didn’t harm time to fall asleep or total sleep overall.
Two caveats emerged. Sleep was worse when people’s body temperature was still raised at bedtime, or when the session was hard relative to how fit they were. And vigorous exercise that ended within about an hour of bed may delay sleep and cut it short.
The NHS advises not exercising in the 4 hours before bed. That’s a cautious rule; the evidence suggests moderate exercise in the evening is fine and a hard session right before bed is the thing to avoid.
Why might exercise help?
- It builds sleep pressure and uses up energy.
- It raises body temperature, and the cooling afterwards is a signal for sleep.
- It eases anxiety and low mood, which often disturb sleep.
- Outdoor exercise in daylight strengthens the body clock.
- Over time, it helps with weight, which lowers the risk of sleep apnoea.
What’s a sensible approach?
- Aim for the NHS guideline of at least 150 minutes of moderate activity a week, such as brisk walking or cycling.
- Morning or afternoon exercise outdoors gives you daylight as well.
- If you exercise in the evening, finish hard sessions at least an hour or two before bed and let yourself cool down.
Keep reading
- The best bedroom temperature for sleep
How heat, cold and humidity affect sleep, what temperature to aim for in a UK bedroom, and how to sleep better in a heatwave.
Moderate - Does a warm bath before bed help you sleep?
What a review of 17 studies found about warm baths and showers before bed, why they help you fall asleep, and the best timing and temperature.
Moderate - Naps: are they good for you, and how long should they be?
What research shows about napping, why 10 to 20 minutes is the sweet spot, when naps make night-time sleep worse, and advice for people with insomnia.
Weak
Common questions
Is it bad to exercise before bed?
For most people, no. A review of 23 studies found evening exercise didn't harm sleep and slightly increased deep sleep. The exception was vigorous exercise ending within an hour of bedtime, which may delay sleep. The NHS advises avoiding exercise in the 4 hours before bed, which is more cautious than the evidence.
What is the best exercise for sleep?
There is no single best type. Studies have found benefits from walking, cycling, resistance training, yoga and tai chi. Doing something you'll keep up, most days of the week, matters more than the type.
How long does it take for exercise to improve sleep?
A single session has small effects that night. Regular exercise over several weeks has larger effects, especially in people who sleep badly to start with.
References
- Kredlow MA et al. The effects of physical activity on sleep: a meta-analytic review. Journal of Behavioral Medicine, 2015.pubmed.ncbi.nlm.nih.gov
- Stutz J, Eiholzer R, Spengler CM. Effects of evening exercise on sleep in healthy participants: a systematic review and meta-analysis. Sports Medicine, 2019.pubmed.ncbi.nlm.nih.gov
- NHS. Insomnia: how you can treat insomnia yourself.nhs.uk
- NHS. Physical activity guidelines for adults aged 19 to 64.nhs.uk
First published 4 November 2026. Spotted an error? Tell us and we'll correct it. Read our editorial policy.