David Musnick, MD, is board-certified in Internal Medicine and Sports Medicine and is certified in Functional Medicine. He has 26 years of clinical experience. His practice, located in Bellevue, Washington, focuses on orthopedic and sports medicine, exercise prescription, pain management, sleep problems, and functional internal medicine. Dr. Musnick has been lecturing on sleep issues for more than 20 years. He is an expert in exercise prescription, pain management, frequency-specific microcurrent treatment, regenerative injection therapy (prolotherapy), and Functional Medicine methods of treating irritable bowel syndrome, obesity, and insomnia. He is the author of a book on functional exercise: Conditioning for Outdoor Fitness: Functional Exercise and Nutrition for Every Body. Dr. Musnick is on the faculty at the University of Washington in both the Department of Orthopaedics and Sports Medicine and the Department of Rehabilitation.