31/07/2025                                                                            
                                    
                                                                            
                                            e-Updates 
"Trajectories of Physical Activity Before and After Cardiovascular Disease Events in CARDIA Participants"
The cohort analysis included 3068 participants, among whom mean (SD) age at baseline was 25.2 (3.6) years, and 1743 participants (56.8%) were female. Race was self-reported; the sample included 529 Black men, 834 Black women, 796 White men, and 909 White women. The nested case-control analysis included 236 incident CVD cases, each matched 1:1 to control participants by age, s*x, and race. Moderate to vigorous–intensity physical activity (MVPA) decreased steadily from young adulthood into middle age, stabilizing in later years. Black men had a more sustained decline, while Black women consistently reported the lowest MVPA. In the nested analysis, MVPA in case participants began declining approximately 12 years before CVD, with accelerated declines within 2 years of the event. Post-CVD, the case-control gap persisted. MVPA trajectories by type of CVD revealed steeper pre-CVD declines in heart failure and consistently low post-CVD levels across all types. Adjusting for pre-CVD MVPA, cases were more likely than controls to exhibit low MVPA post-CVD (OR, 1.78; 95% CI, 1.26-2.50), with the highest risk in Black women (OR, 4.52; 95% CI, 2.29-8.89).
In this cohort and nested case-control study among CARDIA participants, MVPA declined from early adulthood to midlife then plateaued, with notable demographic differences; cases experienced steep declines before CVD, and gaps compared to controls persisted afterward. Black women had the lowest MVPA across adulthood and the highest risk of low MVPA post-CVD, underscoring the need to support lifelong physical activity and address group differences.
(JAMA Cardiology. 2025)
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