Boyi Dai is a professor in the Division of Kinesiology and Health at University of Wyoming, USA. Dr Dai’s research is focused on jump-landing biomechanics and anterior cruciate ligament injuries, exoskeleton and low-back loading, and tripping and falls. He is a fellow of, and serves as a vice president (research and projects) for, the International Society of Biomechanics in Sports. He also serves as an associate editor for Sports Biomechanics.