Erika Dillman is the writer, editor, and producer of an online product review guide at www.fitnesstravelgear.com. She has written health, fitness, and travel articles for a variety of national publications and websites, including "Ms.," "Runner's World," "Self," and "Women's Sports & Fitness Magazine," She is the author of "Outdoors Online: The Internet Guide to Everything Wild & Green "and the popular Little Book series, which includes "The Little Pilates Book" and "The Little Yoga Book,"