Men may need to exercise longer than women for equivalent heart benefits

Men may need to exercise twice as long as women to achieve the same heart health benefits, a major study suggests. A study of 85,000 people found women achieved a 30% reduced risk of heart disease with four hours of weekly exercise, while men needed nearly nine hours for the same benefit. Researchers suggest physiological differences like estrogen levels and muscle types may contribute to the disparity, though all individuals benefit from regular exercise.