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Is 30 Minutes of Exercise a Day Enough?

For years, exercise scientists tried to quantify the ideal “dose” of exercise for most people. The Physical Activity Guidelines for Americans advised anyone who was physically able to accumulate 150 minutes of moderate exercise every week, and half as much if it is intense.

But what’s the best way to space out those weekly minutes? And what does “moderate” mean?

Aim for the 150-minute sweet spot.

“For longevity, 150 minutes a week of moderate to vigorous intensity physical activity clearly is enough,” said Dr. Lee, a professor of epidemiology at the Harvard. She has extensively studied movement and health and helped draft the current national physical activity guidelines.

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