If you work out so that you can lose weight or look good, those are external rewards. And they can help motivate you to stick to your workout routine. But internal rewards can also be strong motivators. For instance, you may feel rewarded by that feeling of success you get when you complete a tough workout. Or perhaps you enjoy feeling more relaxed and upbeat after you exercise. These rewards are more immediate than losing weight or improving your health. So they play a big role in encouraging you to get and stay active.
Make sure to talk with your doctor before starting any new exercise routine.