Morning and evening exercise showed no clear differences in pooled outcomes
Weight, cholesterol and time taken to fall asleep did not differ significantly by exercise timing, but study results were highly inconsistent.
Based on the published abstract. The full paper may contain additional methods, results and limitations.
The 30-second takeaway
Morning and evening exercise showed no statistically significant differences in the outcomes assessed, including body weight, body mass index, blood lipids and time taken to fall asleep. The estimates were highly inconsistent across studies. These findings leave uncertainty about the effects of timing and do not establish that morning and evening exercise are equivalent.
The evidence mixed randomized trials with observational studies and showed very high inconsistency between studies. This abstract-based account lacks details on exercise schedules, participant characteristics and follow-up, limiting its application to any particular setting.
What researchers found
Time taken to fall asleep
Morning versus evening exercise; pooled mean difference. Follow-up is not reported, and the confidence interval included differences in either direction.
What the sleep result means
Sleep was assessed using the time taken to fall asleep. The confidence interval allowed differences in either direction, so the analysis did not tightly rule out a meaningful difference between morning and evening exercise.
What was being compared
The comparison concerned when exercise occurred, with activity defined as at least moderate in intensity. It did not compare exercise with avoiding exercise, or establish the best timing for each person.
The original publication
Effects of evening exercise on anthropometric indices, metabolic profiles, and sleep health: a systematic review and meta-analysis.
Pajareya P, Siranart N, Tokavanich N et al.
Sleep Breath · 2025
- PubMed ID
- 41032147
- Record checked
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