Ross Clifford is a chartered physiotherapist with a lifelong interest in human movement and function, and draws on his knowledge of sport and exercise science to supplement his therapeutic approaches. As an experienced lecturer in physiotherapy and sports science, Ross strives to convey technical information in a clear and accessible way. Ashley Kalym has experienced physical training in many disciplines, including calisthenics, gymnastics, Olympic weightlifting, and a short stint training in the Royal Marines. Ashley's other books include Complete Calisthenics - The Ultimate Guide to Bodyweight Exercise, Second Edition