Optimal Time of Day for Exercise Might be Different for Men and Women

In a small study, researchers studied how the bodies of men and women responded to exercising at different times of the day. The results showed that women burned more fat and improved blood pressure readings by exercising in the morning compared to men who burned

Researchers say women burn more fat exercising during morning hours, while men burn more fat at night. Women aiming to improve blood pressure also get better results by exercising in the morning, the study says.

Scientists from Skidmore College in New York, Arizona State University, and California State University, Chico, studied 30 men and 26 women between 25 and 55 years old defined as “highly active” (completing more than 30 mins of structured physical activity 4 days a week for more than 3 years).

Over 12 weeks, researchers analyzed the effects of a varied training program — consisting of stretching, resistance exercise, interval sprints, and endurance training — with the same relative training volume.

Participants did one of the four different exercise routines one day per week for a total of four workouts per week.

One group exercised for an hour between 6:30 a.m. and 8:30 a.m., while the other group followed the same exercise routines, but between 6 p.m. and 8 p.m.

Researchers found that, among women, morning exercise reduced abdominal fat and blood pressure, while evening exercise enhanced muscular performance.

In the male cohort, evening exercise increased fat oxidation and reduced systolic blood pressure and fatigue.