Vomiting is a symptom that can have many causes
Vomiting or emesis is the violent expulsion from the mouth of the gastrointestinal contents, is usually preceded by nausea. To follow the nausea vomiting due to the vigorous contraction of the diaphragm and abdominal muscles responsible for the expulsion of stomach contents. Usually the vomiting is accompanied by other symptoms such as hypersalivation
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· pallor
· Increased sweating
Vomiting is a symptom that can have many causes, some of which are linked to a function of defense In fact, the ingestion of dangerous substances (drugs, poisons, etc.) or foreign bodies may lead to the rejection should be seen as an attempt by the body to expel what it can do harm.
ADRENALIN
Vomiting during travel or in the hours following may be several possible explanations. One possible cause of this defensive mechanism is caused by blocking the digestive state of stress generated by an intense and prolonged effort like that of a race. When stress is intense, the increased production of certain hormones such as adrenaline, noradrenaline and cortisol makes it impossible to continue the digestion, the first two hormones (adrenaline and noradrenaline) involved in the adrenergic response called "fight or flight." As you might guess by its name, this reaction is designed to prepare the body to a physical and mental effort makes one feel important to the 'nervous system digestive system, "the presence of something that could be harmful in that moment and it is better to get rid of.
The sense of nausea or vomiting occurs right in the final stretch of a race where he usually tries to keep the pace early in the race thus leading to a growing accumulation of lactic acid. A high concentration of lactic acid accumulated during the athletic effort could provoke a feeling of nausea or vomiting as a significant contributing cause blood acidity.
Physical activity can influence the length of stay in the stomach food and beverage industry. Just think of the two hormones increase during the race (adrenaline and noradrenaline) that allow the body to react to stress resulting in increased cardiac output, thus increasing the amount of blood to the muscles and lungs at the expense of the digestive process. If you vomit the food material means that digestion is not fully completed, the body tries to vomit gastric emptying to send more blood to muscles, which at that time have an infinite need, rescuing it from the stomach has so-called stealing of blood from the digestive tract to the muscles. The body blocks the digestion with gastric emptying to find additional blood send to the muscles. In addition, the nausea can be caused a sharp fall in blood pressure accompanied by dizziness, weak legs and my stomach.
TIME OF DIGESTION OF FOODS
Minutes
Food
Up to 30 '
Glucose, fructose, honey, alcohol, electrolyte isotonic drinks
30' - 60 '
Tea, coffee, skim milk, lemonade
60' - 120 '
milk, cottage cheese, white bread, baked fish, mashed potatoes
120' - 180 '
lean meat, pasta, omelettes
180' - 240 '
cheese, lettuce, ham, tenderloin to Grilled
240 '- 300'
grilled steak, pies, roasts, lentils
360 '
tuna in oil, cucumbers, fried mushrooms
480'
sauerkraut cabbage sardine oil
It 'important to leave for a race or a workout always on an empty stomach with digestion in a fully completed and with full stocks. Many athletes think that is enough to digest a breakfast half an hour, but you need three or four hours. In the race restricted to only drink water never ingest any kind of supplement or would-be triggered just another digestive process by subtracting horsepower to your engine, the muscles.
Source: http://www.podistidoc.it/ Dr. Frank Aversano, 15 June 2009
