Weight Loss Exercise: It’s important to do full body workout if you want to lose belly fat—especially if you’re trying to keep it off for the long haul. “Strength training should be a part of just about everybody’s exercise plan,”. Strength training helps you build muscle, which will replace body fat. And because muscle is metabolically active, you’ll continue to burn calories after working out, thereby, reducing overall body fat. Bonus: When your metabolic rate becomes faster due to muscle growth, you’ll have a little more wiggle room in your diet.