14 Workout Mistakes You’re Probably Making

Mistake: You always do cardio first
Fat loss takes more than burning calories during a single workout—it requires building metabolism-boosting muscle. But many of us hit the cardio machines first, and have lost our steam by the team we hit the weights (if we pick them up at all.) "Instead, hit the weights first," says Nick Tumminello, owner of Performance University International. "When you have more energy, you'll be able to lift heavier weights and get more muscle-building benefits, which will help you burn fat everywhere, including your belly." Many believe that cardio is useful for the heart. But, in fact, you need to know your limits. An excessively long cardio session can have a negative effect on your cardiovascular system. Of course, do not give up on cardio — just don’t overdo it.