Results
Nineteen clusters with 29 teams were allocated to the randomised groups and received their intervention, 13 clusters with 17 teams were included in the comparison group. In total, 780 players in these 46 teams were eligible, and 502 players (14–46 years) completed the study (Baseline characteristics for included players (n=502)Estimation of training volume and training load was made on a 1–7 Likert scale, where 1 represents low and 7 high-training volume or load (amount of training and intensity of training). Current and previous complaints describe the number of players who, at baseline, indicated current or previous complaints in the location of interest.*Missing data from 19 players in extended In total, 6601 weekly player reports were collected. The average weekly response rate was 64.8% (men 55.7%, women 68.1%), 68.0% in extended 