What does it take to build a body like Usher? The singer stretches for 10 minutes before and after every workout and uses a combination of Pilates, yoga and massage to loosen up for dance moves. But that's not all. Watch this for Usher's ab workout!
How did David Beckham become one of the fittest men in the world? With a high-intensity interval workout developed by Chris Neville, fitness coach of the Los Angeles Galaxy. Watch this to learn David Beckham's exercise routine.
Zac Efron has one of the best bodies in Hollywood. And it's not because of genetics. Efron is naturally thin with low body fat so to build muscle mass, he has to follow specific diet and fitness rules. Watch this for Efron's best training tips.
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When Bradley Cooper had to get shredded fast for his role in The A-Team, trainer Ramona Braganza knew exactly what he had to do. Cooper's workouts combined cardio, strength training and core exercises with a method Braganza refers to as "3-2-1."
Actor Kellan Lutz is in great shape, despite saying that he hates running and that he gets extremely bored at the gym. Watch this to find out Lutz's best workout secrets and how he earned the title of the "best summer body of 2010."
Actor Ryan Reynolds cut his body fat from 11 percent to 3 percent to play a vampire in Blade Trinity. Working out definitely helped Reynolds uncover his 6-pack, but the most important factor was nutrition. Watch this to learn more!