It seems most of the disussion is revolving around team sports and sports with balls. Although i imagine some gymnastics require a great amount of everything, especially if they do everything on the gym cycle?
All sports require different degrees of athetelism and aspects and it's hard to say which ones are more values over otheres. ie speed vs power etc.
Anyway, although i play a lot of basketball myself and like to think of that as the best sport in all aspects or whatever, i think AFL would be one of the most demanding sports.
Unfortunaley a lof of people (namely US here) would not have seen it or played it at all. The game is non-stop and has 4 quarters, each 20 minutes with time stoppages at ball ups. Although these last about 5-10 seconds, when there is a tie up and the umpire has to throw the ball up, or it goes out of bounds.
Anyway, one of the more active players, a ruck-rover who follows the ball around for most of teh game, will quite often run up to 20Km for a game. This include casual running and also sprints. THere is also a lot of strength needed for tackling and marking as it is a physcuial sport. And they don't wear large amounts of padding, or any at all like they do ion the NFL or ice hockey. So it's extremely physical and fast. There is also, as with any other sport, a high degree of startergy and game tactics so you have to think as well. There's 18 players for each team on the feild at once, ie 36 total.
I also heard lacrosse was a bit like this, but i haven't really seen it before.
Anyway, my vote is for AFL, and then proabbly the ruck-rover. Someone like Buckley, crawford or voss.
although, for sports poeple are more common with, i'll say basketball
