Linda Shelton has served as the fitness director for "Shape" magazine for 21 years, and she also oversees the fitness sections for "Fit Pregnancy "and "Natural Health "magazines. She's an internationally recognized fitness trainer, lecturer, and health writer, with 35 years of teaching experience in the exercise field. A frequent guest on television and radio talk shows, Linda has appeared on programs including "Good Morning America, E! Entertainment, "and "Inside Edition." Angela Hynes is a freelance writer and editor specializing in health and fitness. She's the co-author of "Shape Your Life...