Gordon, LeighSchwellnus, Martin PeterSwanevelder, SonjaJordaan, EsmeDerman, Wayne2017-05-022017-05-022017-09Gordon, L, Schwellnus, MP, Swanevelder, S, Jordaan, E & Derman, W 2017, 'Recent acute prerace systemic illness in runners increases the risk of not finishing the race: SAFER study V', British Journal of Sports Medicine, vol. 51, no. 17, pp. 1295-1300.0306-3674 (print)1473-0480 (online)10.1136/bjsports-2016-096964http://hdl.handle.net/2263/60138AIM : There are limited data on the negative effects of exercise in athletes with acute infective illness. The aim of this study was to determine whether a recently diagnosed prerace acute illness in runners affects the ability to finish a race. METHODS : Runners were prospectively evaluated in the 3 days before the race for acute infective illness and then received participation advice using clinical criteria based on systemic or localised symptoms/signs. We compared the did-not-start and the did-not-finish frequencies of ill runners (Ill=172: localised=58.7%; systemic=41.3%) with that of a control group of runners (Con=53 734). RESULTS : Runners with a systemic illness were 10.4% more likely not to start compared with controls (29.6% vs 19.2%) (p=0.0073). The risk difference of not starting the race in runners who were advised not to run the race compared with controls was 37.3% (56.5% vs 19.2%, p<0.0001). Compared with controls, runners with illness had a significantly (p<0.05) greater risk (any illness (5.2% vs 1.6%), systemic illness (8.0% vs 1.6%), illness <24 hours before the race (11.1% vs 1.6%)) and relative risk (prevalence risk ratio) (any illness=3.4, systemic illness=4.9, systemic illness <24 hours before the race=7.0) of not finishing the race. CONCLUSIONS : Runners with prerace acute systemic illness, and particularly those diagnosed <24 hours before race day, are less likely to finish the race, indicating a reduction in race performance.en© 2017 by the BMJ Publishing Group Ltd. All rights reserved.AdherenceComplicationsExerciseIllnessInfectionsNeck checkReturn-to-playPostprint Article