Moving your body at least three times a week is a wonderful goal to have. It'll help you lose weight or maintain your current weight, it gives you energy, helps you sleep at night, strengthens your immune system, and improves digestion. When you exercise, you want to make sure your weekly routines include three things: cardio for burning calories and working your heart and lungs, stretching to prevent injury and increase flexibility, and strength training to tone your muscles. I know it's tough to include all three all the time, so tell me . . .