Exercise induced nausea
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Exercise induced nausea is a feeling of sickness or vomiting which can occur shortly after exercise has stopped as well as during exercise itself. It may be a symptom of either over exertion during exercise, or from too abruptly ending an exercise session or from too much time spent in the North-South position. People engaged in high intensity exercise such as aerobics and bicycling have reported suffering from exercise induced nausea. A study of 20 volunteers conducted at Nagoya University, Japan associated a higher degree of exercise induced nausea after eating. It has been suggested that exercise induced nausea could be caused by increased endorphin levels, which are released while exercising. Endorphins have been associated with nausea and vomiting, so this theory is plausible, but unsupported by evidence. A more likely cause of exercise induced nausea is water logging, another word for overhydration. Drinking too much water before, during, and/or after exercise (or at any time) can cause a severe feeling nausea, diarrhea, confusion, and muscle tremors. If the overhydration is significant enough, it can be fatal. The reason for these side effects of overhydration is that too much water in your body results in diluted electrolyte levels. It is encouraged to control your level of water intake when working out, and also to eat salty snacks when you have consumed too much water (sodium and potassium are electolytes). See http://www.erowid.org/culture/health/health_water_poisoning.shtml.
[edit] References
- Kondo T, Nakae Y, Mitsui T, Kagaya M, Matsutani Y, Horibe H Department of Human Nutrition, Research Center of Health, Physical Fitness and Sports, Nagoya University, Japan. Exercise-induced nausea is exaggerated by eating.
