Table 1

Examples: assessment of mode of onset

AcuteSudden onset(1) A sprinter pulls up suddenly in a race, stops and hobbles a few steps in obvious pain with a hamstring injury.
RepetitiveSudden onset(2) A gymnast experiences a frank tibial and fibular fracture on landing from a vault; CT imaging reveals pre-existing morphological changes consistent with bone stress, that is, a stress fracture.
RepetitiveGradual onset(3) A swimmer experiences gradual increase in shoulder pain over the course of a season; diagnosed as rotator cuff tendinopathy on MRI.