Lipstick Jungle's Kim Raver had a baby in October. Six months later, she's back in tip-top shape.

What's the star's secret? Running after baby Leo's five-year-old brother, Luke, eating well, working 16 hour days, nursing, and yes, exercising.

Raver has been taking "thigh-kicking" courses called Physique 57. Touted as the most effective workout system in New York City with the power to rapidly transform bodies, Physique 57 is a cardiovascular program of isometric exercises and orthopedic stretches. It tones the seat, abdominals, thighs and arms; strengthens the legs and back; and improves posture to produce a beautiful, sexy body.

If Raver's post-baby body serves as a testimonial for Physique 57, I'd say it's a system that works.

Want more celebrity body talk. Check out this AOL Body site.

Source