[AtlasBarfed]

As a former Ironman distance triathlete anywhere from 11 to 16 hours of completion time, caffiene on race day is a pillar of maintaining both mental and physical sustained exertion.

In Ironman France, which effectively has a Tour De France category 1 climb of 12 miles up a mountain, I got sleepy at the top of the climb, to the point I wanted to take a nap. Yes, you can get sleepy during an ironman.

I has heard 1-2%, 2-4% was greater than I thought. If that is true, no endurance athlete is competitive at the top levels without doing caffeine, so it's almost guaranteed every olympic athlete does caffeine.