Exercising at lower intensities will use more fat for energy. This basic premise is what started the theory of the fat burning zone, which is the idea that working in a certain heart rate zone (around 55 to 65 percent of your maximum heart rate) will allow your body to burn more fat. Over the years, this theory has become so ingrained in our exercise experience that we see it touted in books, charts, websites, magazines, and even on cardio machines at the gym.
It’s important to do full-body strength training 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,” says Dr. Cheskin. That’s because 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 if that’s something you struggle with, says Dr. Cheskin.