Certainly an eye opening experiment. We are all wired differently Tom. I'm a lot like you and am a sweater' and when on the trainer or rollers it looks like I leaked due to the puddles of water under me where the guys next to me, doing the same workout, have a small wet spot. When it is hot and humid I will drink a bottle every 45 minutes at a minimum. I also mix Gatorade at the 1 quart serving per bottle and open 3 electrolyte capsules into each bottle to attempt to replenish the minerals lost in the sweat.

Two weeks ago I was in a race with a time trail, road race and crit. On Friday evening we had the TT and it was 94 degrees. During my 85 minute warm-up for the TT I drank 2 bottles of water and a 1/2 bottle of Gatorade just before the start of the TT. I rode the worst race of the season and barley finished the TT and averaged only an upper Z3 watt average for the short 22 min race. After the fact thinking is that I was depleted of electrolytes due to the sweating and heat during WU and didn't bank ahead on minerals or replace any lost during the WU.