Strength training not only tones muscles but also helps to boost your metabolism. Exercises by Jari Love, a personal trainer and the creator of the Get Ripped! video series ($15 each, www.razorfitness.com).

The Program

Warm-up
Walk in place for two minutes, swinging your arms back and forth.

Workout

Reverse lunges, 15 reps on each leg.

Pulsed push-ups, 10 reps.

Triceps dips with leg lifts, 10 reps on each leg.

Leg-lift crunches, 15 reps.

Repeat this four-move sequence two more times.