Abstract
BACKGROUND AND AIMS: The association of physical activity (PA) with coronary artery calcification (CAC), one of the strongest predictors of cardiovascular disease, is unclear. Moreover, different domains of PA (e.g., exercise/sports vs. work) and extra-coronary calcification (ECC) have not been extensively studied. We comprehensively evaluated the association of PA with CAC and ECC. METHODS: We investigated 2025 ARIC participants (age 73-95 years) without coronary heart disease at visit 7 (2018-19). Mid-life total and domain-specific (sport, leisure, and work) PA scores were estimated using a modified Baecke questionnaire. We modeled the averaged PA scores at visit 1 (1987-89; age 44-65 years) and visit 3 (1993-95; age 49-70 years). We explored continuous CAC and ECC (log-transformed [Agatston score+1]) or the presence of any CAC and ECC (Agatston score >0 vs. 0) as dependent variables using multivariable linear regression and logistic regression models, as appropriate. RESULTS: Total PA scores showed a U-shaped association with both continuous and any vs. no CAC. Higher total PA scores were associated inversely with ECC and most pronounced for the descending aorta calcification. The associations were generally consistent across demographic subgroups. When specific PA domains were examined, higher sport and work PA scores were significantly associated with lower descending aorta calcification. CONCLUSIONS: Mid-life PA showed a U-shaped association with late-life CAC. Among ECC, the association of higher PA with lower calcification of the descending aorta was the most consistent. Our results further corroborate a complex interplay between PA and vascular health and unique pathological processes across different vascular beds.