Most "conditioned" athletes

[Muck]

Have you competed since becoming a Scandinavian citizen?

Nope. I haven't competed in any biathlons in years...and even back in the day I competed in far more summer biathlons (running instead of skiing) due to being in warmer climates.

 

[darbypitcher22]

there's been suprisingly good, civilized discussion here. Some people brought up some sports I had never thought of (cross-country skiing)

 

[GomerBucks]

I was on my high school ski team and was one of the Cross Country guys and competed at the state level. When I was competing, my cardio was ridiculous. The only workout that I have felt to be tougher has been Ju-Jitsu/MMA. I think the biggest factor there is the anaerobic exercise and the resistance of your competition prohibits you from being able to really pace yourself the way you want to.

 

[PlanetFrnd]

Tiger Woods' T-cells.

 

[buckeyegrad]

For those who voted swimming, have you ever considered the whale?

[ame="http://www.youtube.com/watch?v=gsMqakE7noE&feature=relmfu"]Jim Gaffigan on Whales: Free Preview of Mr. Universe - YouTube[/ame]

 

[buxfan4life]

I played football, basketball, I swam and ran track.

Out of all of those sports, swimming by far was the one I had to be most conditioned to participate, especially in the long sprint events. I would practice twice a day (5-7AM swim and lift, 5-7PM team practice), have one or two head to head meets during the week, plus the weekend relay and invitational meets.

I would say that any sport where you have to keep a high level of endurance for an extended period of time (as others have said) would qualify.