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. 2024 May 1;47(5):890-897.
doi: 10.2337/dc23-2448.

Timing of Moderate to Vigorous Physical Activity, Mortality, Cardiovascular Disease, and Microvascular Disease in Adults With Obesity

Affiliations

Timing of Moderate to Vigorous Physical Activity, Mortality, Cardiovascular Disease, and Microvascular Disease in Adults With Obesity

Angelo Sabag et al. Diabetes Care. .

Abstract

Objective: To assess the association between timing of aerobic moderate to vigorous physical activity (MVPA) and risk of cardiovascular disease (CVD), microvascular disease (MVD), and all-cause mortality in adults with obesity and a subset with obesity and type 2 diabetes (T2D).

Research design and methods: Participants included adults with obesity (BMI ≥30 kg/m2) and a subset of those with T2D from the UK Biobank accelerometry substudy. Aerobic MVPA was defined as bouts of MVPA lasting ≥3 continuous minutes. Participants were categorized into morning, afternoon, or evening MVPA based on when they undertook the majority of their aerobic MVPA. The reference group included participants with an average of less than one aerobic MVPA bout per day. Analyses were adjusted for established and potential confounders.

Results: The core sample included 29,836 adults with obesity, with a mean age of 62.2 (SD 7.7) years. Over a mean follow-up period of 7.9 (SD 0.8) years, 1,425 deaths, 3,980 CVD events, and 2,162 MVD events occurred. Compared with activity in the reference group, evening MVPA was associated with the lowest risk of mortality (hazard ratio [HR] 0.39; 95% CI 0.27, 0.55), whereas afternoon (HR 0.60; 95% CI 0.51, 0.71) and morning MVPA (HR 0.67; 95% CI 0.56, 0.79) demonstrated significant but weaker associations. Similar patterns were observed for CVD and MVD incidence, with evening MVPA associated with the lowest risk of CVD (HR 0.64; 95% CI 0.54, 0.75) and MVD (HR 0.76; 95% CI 0.63, 0.92). Findings were similar in the T2D subset (n = 2,995).

Conclusions: Aerobic MVPA bouts undertaken in the evening were associated with the lowest risk of mortality, CVD, and MVD. Timing of physical activity may play a role in the future of obesity and T2D management.

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Conflict of interest statement

Duality of Interest. No potential conflicts of interest relevant to this article were reported.

Figures

None
Graphical abstract
Figure 1
Figure 1
Association of aerobic MVPA bout (≥3 min) timing with all-cause mortality in adults with obesity. No aerobic bouts group represents participants who did not accumulate an average of one or more aerobic MVPA bout (≥3 min) per day over the week.
Figure 2
Figure 2
Association of aerobic MVPA bout (≥3 min) timing with the incidence of CVD in adults with obesity. No aerobic bouts group represents participants who did not accumulate an average of one or more aerobic MVPA bouts (≥3 min) per day over the week.
Figure 3
Figure 3
Association of aerobic MVPA bout (≥3 min) timing with the incidence of MVD in adults with obesity. No aerobic bouts group represents participants who did not accumulate an average of one or more aerobic MVPA bouts (≥3 min) per day over the week.

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Grants and funding

This research was conducted using the UK Biobank resource under application 25813. This study was funded by an Australian National Health and Medical Research Council Investigator Grant (APP1194510) and the National Heart Foundation of Australia Postdoctoral Fellowship (APP107158).