Make sure that you get a sufficient rest after resistant training sessions to help your muscles re-build and re-grow. It is important that you don’t train the same muscle group two days in a row as your body needs at least 48-60 hours to rebuild tissues. Always keep in your mind that your body builds the muscle tissue at rest. In order to preserve your muscle mass when you are exercising for weight loss, it makes a wonderful idea to get enough calories. Although it is generally believed that you should reduce the caloric intake during an exercise regimen, but it is also true that if your body doesn’t get sufficient calories, it will start breaking down muscle tissues in order to conserve the energy.