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"Scientists analysed physical activity records from more than 80,000 people and found that the risk of heart disease fell 30% in women who clocked up 250 minutes of exercise each week. In contrast, men needed to reach 530 minutes, or nearly nine hours, a week to see the same effect."

Does anyone have further research on the limits of exercise health benefits? Previously I've only understood running as largely tapering off benefits past ~300 minutes or 30 miles / week, and more than that is just speed, really. Don't want to put an extra 4 hours a week of time into something for just race times.