Association between timing and consistency of physical activity and type 2 diabetes: a cohort study on participants of the UK Biobank
Authors' conclusion
Total metabolic equivalents of physical activity in the morning and afternoon had a protective effect on diabetes risk and evening activity was not associated with diabetes. Consistency of physical activity did not play a role in decreasing risk for diabetes. Vigorous activity is associated with lower risk no matter the time of day of activity.
Study context
- Population
- UK Biobank participants (mean age 62 years) without a history of T2D
- Participants
- 93,095 participants
- Exposure
- Timing and consistency of physical activity and incident T2D
- Outcome
- Incident T2D
Methodological detailswrist-worn accelerometer for 1 week
- Wrist-worn accelerometer for 1 week
Main finding
As reported in the abstract
Morning physical activity, HR (95% CI 0.86, 0.93), p=7×10-8
0.90
Afternoon physical activity, HR (95% CI 0.87, 0.95), p=1×10-5
0.91
Evening physical activity, HR (95% CI 0.90, 1.00), p=0.07
0.95
Observational data: associations, not effects.
Further findings
Consistency (SD of daily total physical activity) and T2D
- Consistency of metabolic equivalent of task (MET)-measured physical activity not associated with T2D
- P = 0.07
Substitution model
- Effect of substituting afternoon and evening physical activity attenuated after adjustment for lifestyle variables (e.g. sleep time, diet)
Moderate-to-vigorous physical activity (MVPA) and vigorous physical activity (VPA) and T2D
- MVPA and VPA associated with decreased T2D risk at all times of the day
Original publication
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