Why Does Exercise Help some People Lose Weight?
Ghrelin is a hormone produced by cells in your stomach. High levels of Ghrelin increases your appetite and is associated with feeling hungry.  Normally, levels of Ghrelin decrease after you eat a meal, so that you feel full. Remember, that gene variations in one location in the FTO gene can affect how a person responds to exercise. People who are TT at this location tend to be normal weight whether or not they exercise. The Ghrelin levels of people who are TT decrease normally after they eat, making them feel full. The Ghrelin levels for AA individuals, on the other hand, don’t typically decrease very much after they eat. This leaves them feeling hungry. Exercise, however, can decrease Ghrelin levels and aerobic exercise might decrease Ghrelin levels more than strength training . What that means is exercise, especially aerobic exercise, may decrease the Ghrelin levels of AA people, helping them overcome their cravings and restore a normal appetite and ultimately decrease their weight.