Given all the smiley faces, I take it you're joking, yes? At least half-joking

? Truth be told, my longest steady-state rows to date have been 2000m or just under 8 minutes. Well, actually, that's not true. I did row for an hour on Tuesday but that's hardly enough to time to build anything. The fact is, I bonked because I was running out of fuel not because my 'aerobic' energy system is underdeveloped (it's not maximally developed either, I admit, but that deserves a post of it's own). Once I drank the Gatorade I was right back on pace. Here are my splits:
*Note the tremendous drop in watts and strokes/minute at the 17,200m mark as well as the immediate post-carbohydrate rebound. I should also point out that I began the workout in a completely fasted state.
Meters------------Split----------Watts-----S/M
4,300----------0:18:55.2--------152-------27
8,600----------0:19:48.0--------133-------28
12,900---------0:19:51.2--------132-------28
17,200---------0:21:40.1--------101-------25 *
21,097---------0:17:59.4--------132-------27
If nothing else, this discussion is food for thought.