The Hollywood workout: Brooke Burke of E! Entertainment Television shows you one of the hottest celebrity training trends: we let you in on the stars' secret: a speedy, total-body program for core strength and great abs - Fit Hollywood

Shape, Oct, 2003 by Alexa Joy Sherman

WHAT A3: Arms, Abs and Ass, 60 minutes

WHERE greg isaacs 360, Brentwood, Calif.

WHY This blend of standing Pilates, ballet sculpting and core balance--taught by Robin Retherford of Buns of Steel video fame--gets these women sleek and strong in the areas they want it most.

5] WHO Christina Ricci

WHAT Ballet Pilates, 60 minutes

WHERE Crunch in West Hollywood, Calif.

WHY She may be petite, but Ricci, 23, can appear longer and leaner with the lines this class builds. She also strengthens her core, improves her posture and learns the principles of ballet to boot.

6] WHO Carmen Electra

WHAT Cardio Striptease, 60 minutes

WHERE Crunch in West Hollywood, Calif.

WHY Electra, 31, explores the fun, sexy and energizing side of exercise with striptease moves, while blasting fat and calories courtesy of the class' aerobic elements.

7] WHO Renee Zellweger

WHAT Ultimate JumpRope, 60 minutes; yoga, 60 minutes

WHERE Crunch in West Hollywood, Calif. (Ultimate JumpRope); greg isaacs 360 in Brentwood, Calif. (yoga)

WHY Created by professional jump-roper Louis Garcia, the Ultimate JumpRope workout allows Zellweger, 34, to get a playful calorie-torching cardio workout that tones her muscles and improves her athletic skills. Also, the intense, flow style of yoga taught at greg isaacs 360 connects her mind, body and spirit.

8] WHO Daryl Hannah

WHAT Fiesta Latina with Hugo Diez, 60 minutes

WHERE Reebok Sports Club/NY

WHY This blend of basic aerobics and traditional Latin dance moves burns fat and packs an up-tempo groove; perhaps Hannah, 42, caught the Latin fever while shooting her latest film, Casa de los Babys.

--Additional reporting by Lisa Wheeler and Ann Wycoff