Originally Posted by
bluefoxicy
Marathon runners tend to burn off their glycogen stores and keep going on other energy, but their kidneys shut down as a result--an attempt to reduce water loss. The visible symptom is they start gaining weight (while running) until rest and food are supplied--if you weigh yourself every couple miles and gain a few pounds along the way, something is wrong. Eventually vomiting may occur, as well as fatigue, confusion, and brain swelling and death. Vomiting under heavy exertion is considered an indicator.
Is it the loss of glycogen that causes the kidneys to shut down or is it the sheer trauma of pounding the pavement? I ran a marathon 3 weeks ago without any training and, though I felt like I had plenty of energy, it was one of the most punishing experiences of my life. Also, it was my understanding that weight gain and brain swelling was the result of overhydration (ie drinking fluids even after your kidneys have taken a siesta)...after all how can you gain weight if you stop consuming?
What say you bluefoxicy?