# Exercise timing and sleep

Evening training is fine — unless it's vigorous and ends within an hour of bed.



## Takeaways

- Train regularly; RHR falls; sleep lengthens.

- Hard sessions ≥ 1 h (ideally 3 h) before bed.

- Test your own late-workout nights.



Regular exercise modestly improves total sleep, efficiency and deep sleep, and cardio lowers resting heart rate — Galpin's canary. The meta-analysis of evening exercise found no harm to sleep on average; the exception is vigorous exercise finishing within ~1 h of bedtime, which lengthens onset. So 'exercising too late' is a variable to test, not a rule to fear.

Log minutes, intensity and end time; nights after late hard sessions are compared with the rest.



## Sources

- The effects of physical activity on sleep: a meta-analytic review (Kredlow MA, Capozzoli MC, Hearon BA, Calkins AW, Otto MW, 2015)

- Effects of evening exercise on sleep in healthy participants: a systematic review and meta-analysis (Stutz J, Eiholzer R, Spengler CM, 2019)

- Effects of exercise on the resting heart rate: a systematic review and meta-analysis of interventional studies (Reimers AK, Knapp G, Reimers CD, 2018)

- The bidirectional relationship between exercise and sleep: implications for exercise adherence and sleep improvement (Kline CE, 2014)

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Educational summary of published research, not medical advice. Screening scores are not diagnoses. If a score is elevated or you feel unwell, talk to a clinician.

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