RT Journal Article SR Electronic T1 The impact of short periods of match congestion on injury risk and patterns in an elite football club JF British Journal of Sports Medicine JO Br J Sports Med FD BMJ Publishing Group Ltd and British Association of Sport and Exercise Medicine SP 764 OP 768 DO 10.1136/bjsports-2015-095501 VO 50 IS 12 A1 Carling, Chris A1 McCall, Alan A1 Le Gall, Franck A1 Dupont, Gregory YR 2016 UL http://bjsm.bmj.com/content/50/12/764.abstract AB Background The effect of fixture congestion on injury rates and patterns has received scarce attention in elite football and existing investigations have not accounted for player rotation or examined the temporal distribution and potential cause of injuries.Aim To prospectively investigate the epidemiology of injury during short periods of fixture congestion in a professional football club.Methods Over a six-season period, exposure time and injury data were compared in the same players (n=25 (14 individuals)) when participating in two frequently occurring short congested fixture cycles in comparison to match-play outside these cycles. (1) two successive matches separated by an interval totalling ≤3 days calculated immediately from the end of play in match 1 to the beginning of play in match 2; (2) three successive matches separated by ≤4-day intervals starting the day immediately after each match.Results In two-match congestion cycles, incidence rate ratios (IRR) showed that there was a higher risk of injury in the final 15 min of play in the second match in comparison to match-play outside the cycles (IRR: 3.1 (95% CI 1.1 to 9.3), p=0.0400). A greater risk of injury overall (IRR: 2.0 (95% CI 1.1 to 3.8), p=0.0345) and in the first-half of play (2.6 (1.1 to 6,5), p=0.0386), and risk of ankle sprains (10.4 (95% CI 1.9 to 57.9), p=0.0068) and non-contact injuries due to a ‘change in direction’ (IRR: 7.8 (1.3 to 46.8), p=0.0243) were observed in the final match of three-match congestion cycles in comparison to match-play outside the cycles.Conclusions Injury rates and patterns were affected in the same elite football players when competing in short congested fixture cycles in comparison to match-play outside the cycles.