Training and Injury Prevention Platform for Sports
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Luxembourg Institute of Health

RRI4 - End of recruitment

The Sports Medicine Research Laboratory (LIH) has launched a new large study on running. This study is the first to investigate the running technique and the risk of injury in a cohort of over 800 runners! This is one of the largest groups of runners observed over a period of several months. The aim of the study is to identify the influence of the damping properties of the running shoes, the body weight, as well as the running technique on the risk of injury.

The recruitment phase is completed now. More than 870 participants were included in the study. The latter will finish at the end of July 2018. The study conclusions will be available on this site by the end of the year.

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In collaboration with
Ministère des Sports
COSL
Centre Médical Olympique Luxembourgeois

A step towards understanding the mechanisms of running-related injuries

Malisoux L1, Nielsen RO2, Urhausen A3, Theisen D4
1Sports Medicine Research Laboratory, Public Research Centre for Health, Luxembourg.
2Department of Public Health, Section of Sport Science, Aarhus University, Denmark; Orthopedic Surgery Research Unit, Science and Innovation Center, Aalborg University Hospital, Denmark.
3Sports Medicine Research Laboratory, Public Research Centre for Health, Luxembourg; Sports Clinic, Centre Hospitalier de Luxembourg, Luxembourg.
4Sports Medicine Research Laboratory, Public Research Centre for Health, Luxembourg. 

OBJECTIVES:

To investigate the association between training-related characteristics and running-related injury using a new conceptual model for running-related injury generation, focusing on the synergy between training load and previous injuries, short-term running experience or body mass index (> or < 25 kg m(-2)). DESIGN: Prospective cohort study with a 9-month follow-up.

METHODS:

The data of two previous studies using the same methodology were revisited. Recreational runners (n = 517) reported information about running training characteristics (weekly distance, frequency, speed), other sport participation and injuries on a dedicated internet platform. Weekly volume (dichotomized into < 2h and ≥ 2 h) and session frequency (dichotomized into < 2 and ≥ 2) were the main exposures because they were considered necessary causes for running-related injury. Non-training-related characteristics were included in Cox regression analyses as effect-measure modifiers. Hazard ratio was the measure of association. The size of effect-measure modification was calculated as the relative excess risk due to interaction.

RESULTS:

One hundred sixty-seven runners reported a running-related injury. Crude analyses revealed that weekly volume < 2h (hazard ratio = 3.29; 95% confidence intervals = 2.27; 4.79) and weekly session frequency < 2 (hazard ratio = 2.41; 95% confidence intervals = 1.71; 3.42) were associated with increased injury rate. Previous injury was identified as an effect-measure modifier on weekly volume (relative excess risk due to interaction = 4.69; 95% confidence intervals = 1.42; 7.95; p = 0.005) and session frequency (relative excess risk due to interaction = 2.44; 95% confidence intervals = 0.48; 4.39; p = 0.015). A negative synergy was found between body mass index and weekly volume (relative excess risk due to interaction = -2.88; 95% confidence intervals = -5.10; -0.66; p = 0.018).

CONCLUSIONS:

The effect of a runner's training load on running-related injury is influenced by body mass index and previous injury. These results show the importance to distinguish between confounding and effect-measure modification in running-related injury research.

 

Copyright © 2014 Sports Medicine Australia. Published by Elsevier Ltd. All rights reserved.

KEYWORDS: Effect-measure modification; Injury mechanism; Sports injury prevention; Training load monitoring

J Sci Med Sport. 2015 Sep;18(5):523-8. doi: 10.1016/j.jsams.2014.07.014. Epub 2014 Aug 12.

Link to Pudmed abstract