Injury prevention programmes should incorporate interventions aimed at improving glenohumeral rotational range of motion, external rotation strength and scapular control.

Dette er siste tekst-versjon av artikkelen, og den kan inneholde små forskjeller fra forlagets pdf-versjon. Forlagets pdf-versjon finner du på bjsm.bmj.com: http://dx.doi. org/10.1136/bjsports-2016-096226 This is the final text version of the article, and it may contain minor differences from the journal's pdf version. Design Stratified cluster-randomised controlled trial with teams as the unit of randomisation.Setting 45 handball teams (22 female, 23 male) from the two upper divisions in Norway (22 in the intervention group, 23 in the control group) were followed for one competitive season (7 months).Participants 660 players aged 16-47 (331 in the intervention group, 329 in the control group).Intervention Ten-minute comprehensive exercise program to increase glenohumeral internal rotation, external rotation strength and scapular control, as well as improve kinetic chain and thoracic mobility, to be delivered by coaches and team captains three times per week as a part of the handball warm-up throughout the season. Main outcome measuresPrevalence of shoulder problems and substantial shoulder problems. ResultsThe average prevalence of shoulder problems during the season was 17% (95% CI: 16% to 19%) in the intervention group and 23% (95% CI: 21% to 26%) in the control group (mean difference: 6%). The average prevalence of substantial shoulder problems was 5% (95% CI: 4% to 6%) in the intervention group and 8% (95% CI: 7% to 9%) in the control group (mean difference: 3%). Using generalized estimating equation models, a 28% lower risk of shoulder problems (OR 0.72, 95% CI: 0.52 to 0.98, p=0.038) and 22% lower risk of substantial shoulder problems (OR 0.78, 95% CI: 0.53 to 1.16, p=0.23) was observed in the intervention group compared to the control group.Conclusion A comprehensive exercise program reduced the prevalence of shoulder problems in elite handball.

In 2013, the Oslo Sports Trauma Research Center Overuse Injury Questionnaire (OSTRC-O) was developed to record the magnitude, symptoms and consequences of overuse injuries in sport. Shortly afterwards, a modified version of the OSTRC-O was developed to capture all types of injuries and illnesses—The Oslo Sports Trauma Research Center Questionnaire on Health Problems (OSTRC-H). Since then, users from a range of research and clinical environments have identified areas in which these questionnaires may be improved. Therefore, the structure and content of the questionnaires was reviewed by an international panel consisting of the original developers, other user groups and experts in sports epidemiology and applied statistical methodology. Following a review panel meeting in October 2017, several changes were made to the questionnaires, including minor wording alterations, changes to the content of one question and the addition of questionnaire logic. In this paper, we present the updated versions of the questionnaires (OSTRC-O2 and OSTRC-H2), assess the likely impact of the updates on future data collection and discuss practical issues related to application of the questionnaires. We believe this update will improve respondent adherence and improve the quality of collected data.