That’s in part because when you restrict calories, you restrict nutrients. As a result, you lose weight on a crash diet, but much of it is lean, healthy muscle tissue. With less muscle, your body’s metabolism is set at a lower point. So when you go off the diet, even if you eat the exact same number of daily calories as you ate before, you’ll actually gain more fat than you originally carried.
After analysing 1,257 men and 1,366 women who participated in the Canada Fitness Survey they found waist size, "remained significantly lower in subjects performing high-intensity exercise." Worth stressing is this is not casually rolling back and forth on an ab machine or leisurely mounting the thigh master. An idea echoed by research published in the Journal of Obesity who stated, "High Intensity training three times per week was associated with significant reductions in total body fat, leg and trunk fat."
First one’s the Adrenal belly or Adrenal shape, caused by increased levels of cortisol. When going through stressful periods, the production of cortisol increases, and this favours the accumulation of fat around the waist, leading to a saggy abdomen. Both men and women are likely to gain weight around the waist if they are constantly exposed to high levels of stress, and besides the excess belly fat, they are also likely to experience fatigue, back pain, nervousness, poor memory and sleep problems.