The efficacy of morning versus evening exercise for weight loss: A randomized controlled trial
Authors' conclusion
Adults with overweight and obesity experience modest weight loss in response to an exercise program, but there does not appear to be an optimal time to exercise.
Study context
- Population
- Inactive adults with overweight or obesity
- Participants
- 100 adults
- Comparison
- Morning vs evening exercise vs wait-list control
- Primary endpoint
- Weight loss
- Follow-up
- 12 weeks
Methodological detailswait-list control
- Wait-list control
Primary result
As reported in the abstract
Weight change during intervention
| Group | Value | p |
|---|---|---|
| AMEx | mean −2.7 (SD 2.5) kg | p < 0.001 |
| PMEx | mean −3.1 (SD 3.4) kg | p < 0.001 |
Value
AMExmean −2.7 (SD 2.5) kg
PMExmean −3.1 (SD 3.4) kg
p
AMExp < 0.001
PMExp < 0.001
Further findings
| Outcome | Estimate | P value |
|---|---|---|
| V̇O2 peak change vs CON · 12 weeksAMEx vs CON | change +4.7 mL·kg-1 ·min-1 | P = 0.034 |
| V̇O2 peak change vs CON · 12 weeksPMEx vs CON | change +4.2 mL·kg-1 ·min-1 | P = 0.045 |
| Total energy intake vs CON · 12 weeksAMEx vs CON | reduction −3974 kJ | P < 0.001 |
| Total energy intake vs CON · 12 weeksPMEx vs CON | reduction −3165 kJ | P = 0.001 |
Resting metabolic rate and physical activity
- No between-group differences for resting metabolic rate or physical activity
Original publication
The efficacy of morning versus evening exercise for weight loss: A randomized controlled trial. Obesity (Silver Spring). Published 10 December 2022. doi:10.
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