Aggressive executive Margaret Tate in The ProposalWORKOUT PLAN
"I do a lot of pilates, kick boxing and weight training in L.A. and when I'm in Austin I run or ride a bike," says Bullock who splits her time between L.A. and her Texas Ranch. Bullock's L.A.-based trainer, Eden Paul
, trained with Bullock 3-4 days a week to prepare her for The Proposal
. "She wanted to emulate her character and look buff and smashing in suits," Paul says. "We love to incorporate plyometrics, weights, Pilates and boxing." Bullock says the variety keeps her workout regime fresh and helps her maintain motivation to stay healthy and fit, but don't think that's her only incentive. "People ask, 'How do actresses do it?' Um, they pay us to do this in order to look good on film."