2009

RENÉE ZELLWEGER

Dressed in a loose long-sleeved top and stretchy capri pants, Renée Zellweger shows off her form during a jog in Los Angeles. The actress is also a fan of spinning: When Zellweger is in town, she attends classes at East Hampton, N.Y., gym ZoneHampton. Spinning is an effective workout to build leg muscles (and tone your butt!) as well as strengthen your heart. Plus, the average person burns 500 calories in a 45-minute class.

From:Stars' Sporty Styles!