Study finds chronotype-matched exercise improves sleep and cardiovascular health

12 articles · Updated · Tom's Guide · May 1

In a 12-week trial of 134 previously sedentary adults with at least one cardiovascular risk factor, matched exercisers improved Pittsburgh Sleep Quality Index scores by 3.4 points versus 1.2.
Participants completed five moderate-intensity aerobic sessions weekly, with morning or evening workouts aligned or misaligned to morning-lark or night-owl chronotypes.
Researchers also reported gains in blood pressure, autonomic function, aerobic capacity and metabolic markers, with benefits stronger in morning types, challenging blanket advice to avoid later exercise.

Could exercising at the 'wrong' time for your body clock be sabotaging your sleep and heart health more than you realize?

How might personalizing workout timing using wearables or chronotype tests transform fitness and medical advice in the future?