Subscribe to People StyleWatch
Fergie, Kelly Osbourne and more are talking up their favorite fitness tricks and must-do routines
Credit: Most Wanted
Updated: Wednesday Jun 01, 2011 | 01:00 PM EDT
By: Alex Apatoff and Katherine Kluznik Rentmeester
More from PEOPLE
See More News
Heidi, Pippa, Kate and more stay toned simply by playing in the snow!
41 of 47
“[I] never did anything this intensive before," Gyllenhaal says of bulking up for his newest film by practicing parkour, the French physical discipline that involves jumping and climbing obstacles.
Copyright © 2014 Time Inc. All rights reserved. Reproduction in whole or in part without permission is prohibited.