Small study tests if exercise eases heart flutter symptoms

This pilot study looked at whether it's possible to run a larger trial comparing two types of exercise—moderate steady exercise and high-intensity interval training—on symptoms of atrial fibrillation (AF), a common heart rhythm problem. Researchers enrolled 25 men and women with AF who were not already regular exercisers. Participants tried each exercise type for a week and a no-exercise week, tracking their symptoms. The main goal was to see if people would join and stick with the study, not to prove exercise works.