LAUSR

BACKGROUND AND AIMS The impact of long-term endurance sport participation (on top of a healthy lifestyle) on coronary atherosclerosis and acute cardiac events remains controversial. METHODS The Master@Heart study is a well-balanced prospective observational cohort study. Overall, 191 lifelong master endurance athletes, 191 late-onset athletes (endurance sports initiation after 30 years of age), and 176 healthy non-athletes, all male with a low cardiovascular risk profile, were included. Peak oxygen uptake (VO2peak) quantified fitness. The primary endpoint was the prevalence of coronary plaques (calcified, mixed, and non-calcified) on computed tomography coronary angiography. Analyses were corrected for multiple cardiovascular risk factors. RESULTS The median age was 55 (50-60) years in all groups. Lifelong and late-onset athletes had higher VO2peak than non-athletes (159 [143-177] vs 155 [138-169] vs 122 [108-138] % predicted). Lifelong endurance sports was associated with having ≥1 coronary plaque (odds ratio [OR] 1.86, 95% confidence interval [CI] 1.17-2.94), ≥1 proximal plaque (OR 1.96, 95% CI 1.24-3.11), ≥1 calcified plaques (OR 1.58, 95% CI 1.01-2.49), ≥1 calcified proximal plaque (OR 2.07, 95% CI 1.28-3.35), ≥1 non-calcified plaque (OR 1.95, 95% CI 1.12-3.40), ≥1 non-calcified proximal plaque (OR 2.80, 95% CI 1.39-5.65) and ≥1 mixed plaque (OR 1.78, 95% CI 1.06-2.99) as compared to a healthy non-athletic lifestyle. CONCLUSION Lifelong endurance sport participation is not associated with a more favorable coronary plaque composition compared to a healthy lifestyle. Lifelong endurance athletes had more coronary plaques, including more non-calcified plaques in proximal segments, than fit and healthy individuals with a similarly low cardiovascular risk profile. Longitudinal research is needed to reconcile these findings with the risk of cardiovascular events at the higher end of the endurance exercise spectrum.