The stomach is a particularly active organ, always secreting acids and hormones and stirring everything inside to prepare it for later absorption down into the small intestine. As a result, it is a noisy organ, and it is rare that more than a couple of hours go by without your stomach giving you an audible warning of its presence. Running can cause an even greater amount of gurgling than normal, due to the deep breathing that accompanies this act.
There is a good chance that you will drink a considerable amount of fluid before starting a race, especially if it is a race that you expect to last 45 to 60 minutes or more. Even in mild conditions, your fluid losses can be considerable, and when it's hot you need to drink water or a sports drink not only before the race, but also at 15-minute intervals during the race - about 6 or 7 oz (170 to 199 ml) at the same time--, according to the physiologist Pete Pfitzinger. Inevitably, this results in a lot of gurgling and splashing in the stomach. If you do not experience cramps or nausea, the noise, even if it distracts you, is nothing to worry about.
When you run, a larger than normal amount of blood is pumped to the leg muscles to meet oxygen needs. It gathers so much blood in your legs so you can keep moving forward, but this comes at the expense of supplying blood to other tissues - among them, says Doctor Gabe Mirkin, the stomach -. This preferential deviation of blood from the belly to the muscles leads to a marked deceleration of digestion. This can cause cramping if you are not in shape, whereas if you are well trained, you may not perceive anything more serious than many gurgling noises.
Some people prefer to exercise a few hours after a normal meal; others like to eat an energy bar or two an hour before leaving through the door, and others swear that they prefer to run on an empty stomach. If you are in this last range, realize that although it may be more comfortable to run in these conditions, your stomach will take care to remind you that it is empty, especially if your exercise lasts for more than an hour and your body incurs a greater calorie deficit. The idea that running on an empty stomach leads to greater fat burning has become widespread among the sports community, but according to Jacquelyn Rudis of USC University Hospital in Los Angeles, the evidence that could support this view is equivocal at best of the cases.
The act of breathing involves the creation of a negative pressure gradient between the lungs and the external environment.At the end of a normal exhalation, these pressures are equal. The contraction of the diaphragm, a dome-shaped muscle attached to the lower part of the lungs, causes it to flatten and move down over its center. In this way, he pulls the bases of the lungs with him, expanding them and causing the air to rush into them to equalize the pressure. When the diaphragm moves downward, it presses against the stomach, which is seated just below it. Depending on the content of the stomach, this can create some gurgling noises, with deep breaths that can lead to more gurgling.