Do this routine once a week, in addition to the other Bikini Body Cardio workouts and two other moderate-intensity cardio sessions of your choice. Follow the rate of perceived exertion, or RPE, where 1 is lying on the couch and 10 is going all-out as if you were sprinting for the bus.

SHAPE-UP-YOUR-REAR-VIEW STAIR WORKOUT
Find a staircase with at least one flight. (We like to do this workout in a stairwell or at a track with bleachers.) Run or walk up the first flight one step at a time. Take the next flight two steps at a time (jog down in between if you only have one flight). Repeat this pattern for 17 minutes. Follow that with 15 to 20 minutes on your favorite cardio machine at RPE 5–6. Cool down for 5 minutes at RPE 4 then stretch your legs and glutes. That beats the Stairclimber any day!

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