A method of predicting the probability of injuries in ice hockey which consists of analysing data from accelerometers and gyroscopes on the torso of a player and assessing the work load of the muscles of the player as an indicator of the probability of injury. One aspect provides a method of predicting the probability of groin injuries in ice hockey which consists of analysing data from accelerometers and gyroscopes on the torso of a player and assessing groin load as an indicator of the probability of groin injury. A second aspect provides method of managing player availability by limiting injuries which consists of analysing data from accelerometers and gyroscopes on the torso of a player and identifying and counting the number of slap shots executed as a means of assessing the player load as an indicator of probability of injury.