14 Workout Mistakes You’re Probably Making

You routinely go full-throttle
If you exercise at a high intensity every workout, you may be overtraining, says Cosgrove. In addition to putting you at risk of injury, it can stall your progress. If you don't give your body ample time to recover between exercise sessions (such as doing back-to-back strength-training workouts), your muscles are in a constant state of being broken down and aren't getting the opportunity to repair, which is how you gain fat-torching muscle mass, she adds. Your body also perceives excess exercise as a stressor, which can boost levels of stress hormones and cause you to store rather than shed belly fat.