Fitness after the belly becomes bigger, from a professional point of view is a normal phenomenon, the belly increases because of the increase in muscle, which is actually a good phenomenon, fitness not only consumes fat but also increases the function of internal organs and improves the proportion of muscle in the body. Muscle is more dense than fat, fitness dieters reduce a kilogram of fat but increase a kilogram of protein, will be expressed as weight gain, abdomen bigger, although in the early stages of fitness feel bigger belly, but from the overall point of view is essentially exercise to play a significant effect, weight will continue to decline sooner or later. There are many people who say that the belly becomes bigger is not fat, this time the body fat rate is not very low, fat and muscle coexist, after a period of time and then measure the thighs, arms and hips and other parts of the latitude will be found to shrink.