I feel great right up until about 20 miles into the race. Then I start feeling this feeling almost like a mild nausea, my saliva gets kind of thick and my digestive system just feels kind of crappy, I little like I could throw up. The same thing happenned during a Triathlon this past weekend except much earlier on in the race in terms of time. Every time it happens I try to fix it but I cant figure out the problem. Am I drinking too much, too little, impoper nutrition?
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