Interventions
MH
For the randomised groups, coaches and player representatives for each team were invited to practical workshops where the intervention was introduced. Thereafter, coaches led the injury prevention training with their teams. Due to the pandemic, only two workshops were carried out before group gatherings were discouraged. Site visits where the intervention was introduced were made in the remaining teams (n=9), except one team that only received written material and information about the adductor programme via telephone. The workshops were led by two of the main researchers (HL or MH) together with a team of physiotherapists. These physiotherapists also led the practical sessions during site visits. Programme material was offered in written format (folder with pictures and instructions for each exercise) and digitally on a webpage (videos and instructions for each exercise). Teams were recommended to start with their intervention immediately after the workshop/site visit and to use the intervention throughout the season. Coaches were contacted via telephone 1 month after introduction to support training progress.No workshops or information material were offered to the comparison group. At baseline, coaches from eight teams in the comparison group reported use of the 