Rachel Cosgrove, CSCS, has been the co-owner of Results Fitness with her husband, Alwyn Cosgrove, for over 20 years. Located in Southern California, it was voted one of the top 10 gyms in the United States by Men’s Health magazine for three years in a row. Cosgrove earned her bachelor’s degree in physiology, with an emphasis on exercise and health, from the University of California–Santa Barbara. She holds the Certified Strength and Conditioning Specialist (CSCS) credential from the National Strength and Conditioning Association (NSCA) and is certified as a U.S. Olympic weightlifting coach and as a U.S. triathlon coach. She taught the very first USA Obstacle Course Racing Level 1 certification course at the U.S. Olympic Training Center in 2019. In addition to being one of the first people certified by the International Society of Sports Nutrition (ISSN), she has the Nutrition and Lifestyle Coach certification from the prestigious CHEK Institute and Precision Nutrition. She also holds the Russian Kettlebell certification, the Ultimate Sandbag certification, and the Functional Movement Screen certification. Named IDEA Personal Trainer of the Year (2012), Cosgrove has been a featured expert in a number of magazines, including Women’s Health, Muscle and Fitness Hers, Oxygen, Shape, Men’s Health, More, Real Simple, Women’s World, U.S. News & World Report, and Men’s Fitness. She has also appeared on Fox, WGN, ABC, NBC, and the Dr. Oz show, and she was a spokesperson for Secret deodorant. She is a sought-after presenter at national and international conferences and events. She is the author of The Female Body Breakthrough and the Women’s Health–branded book Drop Two Sizes. She has also served on the advisory board for Women’s Health and Livestrong.com and worked as a consultant for Nike.