Level up with lifting. How you set the intensity of your reps can help strengthen not just the muscles you see in the mirror but also one behind the scenes the provides power- namely, your heart. In a recent American Council on Exercise (ACE) study, former noneexcercisers who did six weeks of heavier lifting, using weights they could perform only five reps with , got as strong or stronger than those who did 10 reps with moderate weights, and they were the only group who significantly lowered their blood pressure.
