Exercise prescription is when your doctor or healthcare provider tells you how much and what type of exercise you should do. For example, if your doctor thinks you should do more physical activity, they may prescribe 30 minutes of walking each day or an hour of swimming each week. They may also prescribe specific exercises like using the treadmill or lifting weights. All of these activities are exercises, and your doctor or healthcare provider is giving you a prescription to do them. Doing these exercises can help you stay healthy and feel better.