Gene Young / Splash News
Reese and Jake
The great thing about this match: Team up with them and you won't have to worry about uniforms!
Mark Edwards / Splash News
Katie and Tom
Wherever they're filming, these sweethearts like to take their sweat session outdoors.
Demi and Ashton
One thing's for sure: Keeping up with the Kutchers would be a lot of fun.
Naomi and Liev
You can count on this pair for a great ride — though you'll want to leave on your helmet.
Originally published on FitnessMagazine.com, October 2009.