
Team and player compliance with the INT was 60% and 74% respectively. In total, 130 injuries were recorded affecting 104 (25%) of the 416 players. The secondary outcomes were injuries reported by body location, aetiology, mechanism and severity. The primary outcomes were any injury to the players, injuries by type of exposure and injuries specific to the lower extremities. Participating teams were prospectively followed through an entire league season of 6 months in which they were visited every week to assess injured players for time-loss injuries in both groups. The INT group performed the FIFA 11+ exercises as warm-up during training sessions and the CON group performed usual warm-up. All the 20 teams (414 players aged 14 -19 years) in the Premier League division were block-randomised into either an intervention (INT) or a control (CON) group.

FIFA 11 PLUS WARM UP TRIAL
A cluster randomised controlled trial was conducted. The purpose of the study was to examine the efficacy of the FIFA 11+ programme in reducing the risk of injuries among male youth football players of the Lagos Junior League. However, studies to prove its efficacy are generally few and it is yet to be tested in male youth footballers and among African players. The FIFA 11+ is a structured warm-up programme specially designed to prevent injuries among football players from age 14 years and above.
