The volume of high-speed running in modern soccer has increased in line with greater demands placed on professional players, but this has come at a cost, with hamstring injuries on the rise, sometimes sidelining key players for months. In a world first for sprint training analysis in soccer, Abertay University and St Johnstone FC used near-infrared spectroscopy (NIRS) and GPS trackers to study the effect of sprinting on players' leg muscles, with the aim of finding ways to lower the risk of hamstring injuries in the professional game.