Your plan will likely include low-impact activities, like walking, swimming, bicycling, or using an elliptical machine. Any of these will get your heart pumping. You’ll hear this called “cardio” or aerobic exercise. Also, strength training uses resistance to work your muscles. You can use machines at a gym, hand-held weights, resistance bands, or even your own body weight. It strengthens muscles and increases the amount of activity you can do.