Pasternak has trained celebrities like Alicia Keys, Eva Mendes, and Halle Berry, and recently he's been whipping The Fast and the Furious actress Jordana Brewster into fantastic shape. Women's Health interviewed Jordana and got the scoop about her workouts, learning that she likes having a routine "because everything else . . . is so unpredictable." She shared her routine with WH and said,
I do cardio six days a week, with weight resistance in between. I also work with [celebrity trainer] Harley Pasternak three times a week. I used to run, but can't anymore because [it hurts my knees]. But what's just as effective? Putting the treadmill at an incline of 12— that's steep!—and climbing for 30 to 40 minutes.
Sounds like a workout that would definitely work up a sweat. Here's an uphill treadmill hike workout for you to try. Has an injury prevented you from running?