Skin-tight leather pants and a dominatrix-inspired halter? Most of us would have a heart attack if we had to be seen in such an outfit. But Halle Berry knew right where to turn when she needed to get her body ready for exactly that kind of suit in Catwoman. To get her superhero physique, Halle called fitness trainer and founder of 5-Factor Fitness, Harley Pasternak.

• Find out how Halle Berry keeps up her flawless figure
• Tips for starting 5-Factor Fitness today

5-Factor Fitness ‑- the Basics

Pasternak, whose celebrity clientele also includes Eve, Orlando Bloom, Benjamin Bratt and Val Kilmer, boasts a workout and nutrition plan that skips the carb counting, food measuring and time-consuming exercise routines. His 5-Factor plan is made up of five, 25-minute workouts per week (all of which can be done using only a set of dumbbells and a bench) and eating five healthy meals per day.

"The 5-Factor Fitness plan," he says, "is the product of several years of being a science nerd, a fitness nut and an exercise and nutrition scientist for the military, and then having the opportunity to work with a lot of actors who have very little time and have to see results."

Time is one of the main reasons the plan works. "This is something that is a lifestyle," Pasternak says. "So, regardless of what your needs are at the time, I tell people that this is a plan that is doable every week for the rest of your life. You don't have to go to the gym; you can if you want. It's only 25 minutes long. You always have the time, and the meals are not extreme, so you can always do this."