Chronotype‑Aligned Exercise Improves Heart Health

A 12‑week trial of >130 middle‑aged people with cardiovascular risk factors found that exercising at times that matched participants’ natural circadian rhythms led to larger improvements in systolic blood pressure, resting heart rate, aerobic capacity and sleep quality than exercising at mismatched times. The benefit was especially pronounced for early‑rising participants who trained in the morning. — If reproducible, the finding could change public‑health exercise recommendations, influence workplace scheduling and inform personalized chronomedicine interventions.