14 Workout Mistakes You’re Probably Making

You take a break between sets
If you're kicking back between sets, you're missing out on a major belly-fat frying opportunity. "Even though weight training is anaerobic, if you string 4 to 6 exercises together without any breaks between each one, you create an aerobic benefit so your heart rate goes up and you burn more calories than you would if you rest between sets," Tumminello says. Plus, it creates a bigger afterburn, so you'll continue burning calories for several hours after your workout.