These moves (the how-tos are on the following pages) target every major muscle group and get your heart beating. Exercises by Kimberly Spreen, national director of group fitness for Life Time Fitness and instructor in 10 Minute Solution: Fitness Ball Workouts ($15, www.collagevideo.com).

The Program

Warm-up
March in place for two minutes, swinging your arms and lifting your knees high.

Workout

Dynamic push-up; then roll into frog, ending in position for another dynamic push-up. Go slowly enough to maintain control. Do 15 repetitions.

Supported side crunches, 15 reps on each side.

Rolling reverse planks, 15 reps.

Repeat the four- move sequence two more times.