If dilution is the solution, then why?
About 6.5 hours into a warm swim (WT=75F=23.9C) I started throwing up my feeds. This has never happened before. The first time it happened, I thought it was a fluke. The next feeding was even worse: I could only manage two sips and they too came right back up. I asked for my crew to dilute my feeds to 50% because I'd heard somewhere that diluted feeds work for warm water. Lo and behold, the first diluted feed went down and stayed down and I felt fantastic after that. I'm trying to understand the reason, though. My feeds are a custom mix (carbs, a little protein, electrolytes) and my crew was keeping them cold, which makes me very happy. Any ideas?