Zac's birthday present

TRAIN LIKE A SURFER

For Zac Efron's 21st birthday, his High School Musical 3: Senior Year costar Ashley Tisdale gave him an Indo Board ($99.95), a balance-training tool to help the actor (with girlfriend Vanessa Hudgens) with his surfing. Even if you have no plans to hang ten, the board – which is balanced on a cylindrical roller or cushion and comes with an instructional DVD – helps develop core strength and coordination. For other ab-firming exercises, try Health.com's 10-minute workout! – Serena Kappes