In my opinion wrestling is by far the most demanding cardio and mentally demanding sport I have ever seen or played. Three minute matches can make you wanna puke because you are putting so much effort into just trying to get the better position. No one can f**k up the match exept you. Now I have been at turny level at wrestling (States 03) and I know it's demands, paintball no I don't. Maybe there is somthing hiding in there.
Football is also in my opinion the most physically demanding sport. If you did not lift and run everyday over your summer you could forget starting and being competitive. Heh, I have had concusions before from running down the field full speed and tackling someone that was full speed as well. The trainers usually pat ya on the back till you are coherent then tell you to go back out there. Not so fun seeing double for a while.
Either way i'll drop this subject now because there is no need to make it a large flame fest. Maybe one day ill give turny caliber paintball a try to see it from your perspective.