Trial Finds 60% of Adults May Gain More When Exercise Matches Chronotype

2 articles · Updated · ScienceAlert · May 16

A randomized controlled trial found people at cardiovascular risk improved blood pressure, aerobic fitness, blood glucose, cholesterol and sleep more when workout times matched their chronotype.
Participants trained either in their preferred window—8-11am for morning types and 6-9pm for evening types—or at the opposite time, with aligned schedules producing the stronger gains.
Even misaligned exercise still delivered health benefits, suggesting timing enhances results rather than determining whether exercise helps at all.
The study excluded intermediate chronotypes, who make up about 60% of adults, so the timing effect may matter most for strong morning or evening types.
Researchers say workout timing is only one factor: afternoon body-temperature peaks can aid performance, regular training can shift adaptation, and late intense sessions may hurt sleep.

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The latest research on exercise timing excluded 60% of people. Does this advice apply to the average person?