Can running-related injuries be prevented through an online behavioural intervention in adult novice runners? Results of a randomised controlled trial.

Objective: To evaluate the effectiveness of the Runfitcheck on time until the onset of a new running-related injury (RRI) among adult novice runners. Methods: A three-arm randomised controlled trial was conducted over 7 months. Adult novice runners completed a baseline online questionnaire on their characteristics, running activity, RRIs and injury preventive behaviour. Runners were randomly allocated to one of two intervention groups or the control group (n=238). One intervention group obtained access to the Runfitcheck (n=252), an online intervention to encourage injury preventive behaviour, and was fortnightly promoted to use Runfitcheck; the other intervention group (n=251) was directed towards the Runfitcheck once. Runners were followed for 4 months, not all starting at the same time over 7 months. The main outcome measure was time to a new RRI using the Oslo Sports Trauma Research Centre Overuse Injury Questionnaire, and was analysed with survival analysis Cox regression. Generalised estimating equations (GEE) were used to gain insight into the effectiveness of the Runfitcheck. Results: The time to the occurrence of the first RRI did not differ between the study groups (Wald χ2=0.893). GEE analysis showed no difference in the risk of a new RRI in the group that was referred to the Runfitcheck once (OR 1.22, 95% CI 0.86 to 1.74) nor in the active approach group (OR 1.01, 95% CI 0.71 to 1.45) compared with the control group. Furthermore, the onset of the new RRIs did not change over time (OR 0.96, 95% CI 0.91 to 1.01). Conclusions: The online intervention Runfitcheck was ineffective in reducing the instantaneous risk of new RRIs in adult novice runners. More research is needed to determine how injuries in novice runners can be prevented. Trial registration number: Dutch Trial Registry (ID: NL7823).

Injury Risk Is Increased by Changes in Perceived Recovery of Team Sport Players.

OBJECTIVE: The aim of this study is to investigate if changes in perceived stress and recovery over the course of a season are risk factors for acute and overuse injuries. DESIGN: A prospective nonexperimental cohort design. SETTING: Data were gathered at the SportsFieldLab Groningen and at the facilities of the participating teams. PARTICIPANTS: Eighty-six male and female basketball, volleyball, and korfball players aged 21.9 ± 3.5 years. INTERVENTIONS: In this 10-month observational study, the independent variables are the changes in perceived stress and recovery. MAIN OUTCOME MEASURES: The Recovery-Stress Questionnaire for Athletes (RESTQ-Sport) was filled out every 3 weeks throughout the season to assess changes in perceived stress and recovery. Acute and overuse injuries were registered by the teams' physical therapists. Odds ratios and 95% confidence intervals were calculated. RESULTS: During one season, 66 acute and 62 overuse injuries were registered. Multinomial regression analysis showed that perceived General Recovery, shown in the scales Social Recovery and General Well-Being, decreased in the 6-week period before an acute injury (OR 0.59 and 0.61, respectively, P ≤ 0.05) compared with healthy periods. Risk of overuse injuries increased when perceived Sport Recovery, shown in the Personal Accomplishment scale, decreased in the 3-week period before the injury (OR 0.59, P ≤ 0.05) compared with healthy periods. CONCLUSIONS: Therefore, decreased perceived recovery can indicate an increased injury risk. General Recovery affects acute injury risk and Sport Recovery affects the risk of an overuse injury. Monitoring perceived recovery over the course of a season could give guidance for recovery enhancing practices to prevent injuries.

Dynamic postural stability differences between male and female players with and without ankle sprain.

OBJECTIVES: To evaluate dynamic stability index (DSI) differences between males and females for different jump directions. To examine both preseason DSI differences between players with and without a history of ankle sprain, and between players with and without an ankle sprain during the subsequent season. DESIGN: Prospective cohort design. SETTING: Laboratory. PARTICIPANTS: 47 male (22.9 ± 3.9 y) and 19 female (21.5 ± 2.9 y) sub-elite and elite team sport players. MAIN OUTCOME MEASURES: Ankle sprain history was collected using an injury history questionnaire. DSI of a single-leg hop-stabilization task measured preseason was collected using force plates and calculated using a Matlab program. Ankle sprains were reported during the subsequent season. RESULTS: Male players demonstrated larger DSI than female players on forward medial/lateral stability index (MLSI) and vertical stability index (VSI), diagonal VSI, and lateral anterior/posterior stability index (APSI) and VSI. Forward, diagonal and lateral dynamic postural stability indices (DPSI) were larger for males (p < 0.001). No significant differences were found between players with and without a previous ankle sprain nor between players with and without an ankle sprain during the subsequent season. CONCLUSION: Male players showed larger DSI scores than female players, indicating lower dynamic stability. Sex-specific training sessions or prevention programs should be developed.