Exercise changes metabolism. Regular exercise allows overweight people to lose fat and control their weight. What activity, how often, how hard, and how long are important questions to ask when adding exercise to your lifestyle. The most effective workout program includes both aerobic exercise and strength training. The combination yields faster fat loss at any age.
Aerobic exercise increases metabolism.
Strength or weight training builds muscle. Muscle rids the body of excess fat by burning fat for fuel. Heart rate, speed, strength, and metabolism all improve as one gets fitter and trimmer. The phrase, no pain no gain, is simply not true. Do not try to whip yourself into shape in just a few weeks, because it does not work.