SNAPPS, which is an acronym for Survey instrument for Natural history, Aetiology and Prevalence of Patellofemoral pain Studies, is a screening questionnaire to identify people with Patellofemoral pain in populations between the ages of 18 and 40, the questionnaire discriminates between patellofemoral pain and soft tissue injuries. SNAPPS is created by Professor Paola Dey, Professor James Selfe and Professor Michael Callaghan (Dey et al., 2016).