Women benefit much more from exercise than men, reaping many more gains with considerably less work, a new study reports.

With the same amount of exercise, women experience a three-fold reduction in their risk of death from heart disease compared to men, researchers reported Monday in Nature Cardiovascular Research.

These results show that "one-size-fits-all" exercise guidelines are misguided, in that they assume both sexes derive the same benefit from the same amounts of exercise, researchers concluded.

"Compared with male individuals, females derive equivalent health benefits with only half the exercise time," wrote the research team led by Jiajin Chen, a research associate with the Xiamen University Institute of Cardiovascular Diseases in China. "The findings might have potential to encourage females to engage in physical activity."

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