Dr. Jesús Olmo is a specialist in Rehabilitation and Prevention of orthopedic and sports injuries, as well as expert in the health and performance of professional athletes. He is co-founder and director of the Football Science Institute. After heading the medical services of the Spanish...

THEORETICAL FRAMEWORK The physical abilities associated with accelerations, decelerations, and rapid changes of direction (CODs) are considered key components in the match demands of various team-sports (Abdelkrim et al., 2010). A recent systematic review showed that there are approximately 500 to 3000 changes of activity throughout...

1. The prognostic value of the hamstring outcome score to predict the risk of hamstring injuries. van de Hoef PA, Brink MS, van der Horst N, van Smeden M, Backx FJG. Analysis of data of 356 amateur soccer players showed that the hamstring outcome score (HaOS) questionary...

1. The Moral Gatekeeper: Soccer and Technology, the Case of Video Assistant Referee (VAR) Tamir I, Bar-Eli M. This paper argues that, despite fierce objections and extensive criticism, VAR represents a moral revolution in the evolution of the sport as a whole, improving the professional standards, its...

Professor Rob Duffield is a sports & exercise scientist at the University of Technology Sydney. He also works as Head of Research & Development for Football Federation Australia (FFA). His research areas include factors related to fatigue and recovery, sleep and travel, training and cooling...