Do More Strength Training
One of the best ways to improve your metabolism is by being more physically active. "When you exercise, you're burning more calories," Dr. Arad said. You can and should also begin to strength train in order to build more muscle. "If you build more muscle and you have more muscles that require energy, then you're going to increase your metabolic rate," he said.
If you aren't familiar with strength training, this four-week beginner's program is a great starting point.