After exercise, the reduction of stool frequency or urine yellow volume is related to exercise dehydration and insufficient hydration. Exercise consumes a lot of energy. When consuming energy, the body will also produce a lot of heat, and the body will sweat a lot in order to keep the body temperature constant. If water is not replenished in time, it will cause dry stool and yellow urine. If you do this often, it will have an impact on your health. So you should get into the habit of drinking more water, whether at ordinary times or during exercise.