A person with low resting metabolism might gain weight more easily and have a more difficult time losing weight than someone with a higher metabolism. Revving up metabolism allows you to use extra calories around the clock. Stop dieting and start exercising. More specifically, start strength training. Weightlifting can increase a person's metabolic rate more than aerobic exercise can.
Metabolism is affected by body composition - the amount of muscle versus fat.
People who are more muscular have higher metabolisms than those with more fat weight. According to the American Council on Exercise, even while asleep our skeletal muscles are responsible for more than 25 percent of our calorie use. Since muscle is so active, muscle burns about four times the energy fat does when we're at rest. So building muscle is not just for those who want to bulk up. Strength training helps replace fat with muscle, thus contributing to a more speedy metabolism.