“…Previously, a randomised controlled trial (RCT) have shown that a comprehensive strengthening programme, supervised by physiotherapists, including focused hip-adductor strengthening is highly effective in the treatment of long-standing adductor-related groin pain 35. The preventive effect of a programme based on this treatment, supervised by the team coach, has also been investigated in an RCT and found a 31% reduction of groin injuries in a soccer population, however, not significant 36. The lack of a significant effect of this programme have been suggested to be the result of different factors, such as an insufficient sample size, and a possible lack of compliance of the soccer players to perform the programme as prescribed, regarding the intended frequency and intensity 36.…”