The big shock was that the health benefits were remarkably similar no matter how much running the people had done. Even about ten minutes of moderate exercise a day added years to their lives.35 There is a difference between a leisurely walk and a brisk run, however. To engage our longevity genes fully, intensity does matter. Mayo Clinic researchers studying the effects of different types of exercise on different age groups found that although many forms of exercise have positive health effects, it’s high-intensity interval training (HIIT)—the sort that significantly raises your heart and
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