Angela Hynes is a freelance writer and editor specializing in health and fitness. She's a regular contributor to Shape, and her work has also appeared in numerous other national and international publications. A resident of Los Angeles, she practices yoga every day and enjoys hiking in the local hills with her dog. She's also and adventure travel enthusiast.

Linda Shelton has served as the fitness director for Shape magazine for 21 years. She is 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!, and Inside Edition She has worked as a producer, director, fitness consultant/technical advisor, scriptwriter, and/or choreographer for more than 250 fitness videos. Linda enjoys hiking with her two golden retrievers, gardening, dancing, and weight training; and she still teaches yoga, strength, and Pilates classes regularly.