Build Your Muscles
Don't fear the heavy weights! Many experts like Nicole Aurigemma, a physiologist at the Penn State Muscle Biology Lab, agree that you should focus on strength training to increase your muscle mass to burn more calories and speed up your metabolism.
How many days should you strength train? Aim for at least three sessions a week, include all parts of your body, incorporate different exercises, and use a variety of equipment, including strengthening bodyweight moves.