Cohort Studyhigh evidence
Adolescent Cardiorespiratory Fitness and the Trade-Off Between Atrial Fibrillation Risk and Cardiovascular Benefits: A Nationwide Sibling-Controlled Cohort Study.
Circulation·July 7, 2026·PMID 42165142
Why it mattersConcerns about AF risk in highly fit individuals may deter exercise promotion. This study clarifies that familial confounding explains much of the observed AF excess, and high adolescent fitness yields net cardiovascular benefit, supporting youth fitness initiatives.
The papers that matter, first.
MedLit ranks the medical literature into a specialty feed with concise summaries, evidence-aware triage, and visual takeaways.
§
MedLit · Evidence, Distilled