For anyone not familiar with my constant whining across OT in the past year, here's some background. About a year ago, I got pissed off at being fat and injured, lost 80 lbs, and kicked my butt into something approaching shape (or, a shape other than round). I've spent the last six months training specifically for a marathon canoe race (texas water safari, 262 miles, if you've ever heard of it). Of course I entered in the toughest class available. In the two "intro" races this year, I made a decent second place in my class (which isn't THAT impressive, competition is always thin because it's so stupid hard). But i'm favored for a solid and respectable finish time, if nothing spectacular. Now for the advice part. For me, this race is going to be 45-55 hours long. Yeah, no stopping for sleep. Constant paddling in the sun, night, water, etc. I've been preparing with 8 to 16 hour training runs. Obviously I can't get close to the actual race length - that will do more physical harm than good. So what can I do to prolong performance? What I have going now is near-constant sucking on gatorade, gu, spiz, etc for hydration and calories, solid food like powerbars, some jerky, some salty munchy things (think fritos). What else can I do to help endurance? If you would, briefly describe your background or what you do so I can understand where you're coming from.