Performing strength-training exercise for only 30 to 60 minutes each week can cut your risk of heart disease in half. According to a new study published in the British Journal of Sports Medicine, people who performed muscle-strengthening exercise 30 to 60 minutes each week combined with any amount of aerobic activity had a 28 percent lower risk of dying from cancer, a 46 percent decreased risk of heart disease, and a 40 percent lower risk of premature death from any cause. Even when they did not perform aerobic exercise, the strength training provided health benefits. If this data doesn’t convince you to add one or two days of resistance training each week, know that lifting weights can help your body build more muscle to burn more calories at rest too.