ROB PARR has helped superstars fine-tune their physiques for more than twenty years. Parr enjoys mixing up routines, making them more effective and interesting. He has been written about in People, InStyle, Vogue, Us Weekly, Self, Marie Claire, Women's Health & Fitness, For Me, and other publications, and he is also a popular contributor to msnbc.com.

LAUREL HOUSE is the coauthor of The Guru's Guide to Serenity and Raise the Barre. She is the West Coast editor for Fit magazine and her articles have been featured in First for Women, Women's Health, Elegant Bride, and other popular publications. She has appeared on CBS, Fox, NBC, and ABC morning news shows nationwide.