Celebrity Fitness

And the Sports Illustrated 2009 Swimsuit issue cover goes to...Israeli supermodel Bar Refaeli (here in a Luli Fama swimsuit), who stays in shape with a variety of cardio and martial-arts based workouts, including Krav Maga. "My trainer taught me all kinds of kicks and they work everywhere—your abs, your butt," Refaeli says. The Israeli fighting method Krav Maga, which has attracted stars like Jennifer Garner, Charlize Theron and Anna Kournikova, provides a full-body workout very similar to cardio kickboxing and uses resources you can find at most gyms including kettle bells, jump ropes, boxing bags and gloves.

See more Bar Refaeli in Sports Illustrated's Swimsuit 2009