Conclusions Our results demonstrate that the existence of a relationship between training load and injury continues to be well supported in the literature and is strongest for subjective internal training load .
The directionality of this relationship appears to depend on the type and timeframe of load measured
Background The relationship between training load and musculoskeletal injury is a rapidly advancing area of research in need of an up date d systematic review .
The NLstart2run study: Training-related factors associated with running-related injuries in novice runners.
OBJECTIVES The incidence of running-related injuries is high . Some risk factors for injury were identified in novice runners , however , not much is known about the effect of training factors on injury risk . Therefore , the purpose of this study was to examine the associations between training factors and running-related injuries in novice runners , taking the time varying nature of these training-related factors into account . DESIGN Prospect i ve cohort study . METHODS 1696 participants completed weekly diaries on running exposure and injuries during a 6-week running program for novice runners .  Total running volume ( min ) , frequency and mean intensity ( Rate of Perceived Exertion )  were calculated for the seven days prior to each training session . The association of these time-varying variables with injury was determined in an extended Cox regression analysis . RESULTS The results of the multivariable analysis showed that running with a higher intensity in the previous week was associated with a higher injury risk . Running frequency was not significantly associated with injury , however a trend towards running three times per week being more hazardous than two times could be observed . Finally , lower running volume was associated with a higher risk of sustaining an injury . CONCLUSIONS These results suggest that running more than 60min at a lower intensity is least injurious . This finding is contrary to our expectations and is presumably the result of other factors . Therefore , the findings should not be used plainly as a guideline for novices . More research is needed to establish the person-specific training patterns that are associated with injury
Conclusions Our results demonstrate that the existence of a relationship between training load and injury continues to be well supported in the literature and is strongest for subjective internal training load .
The directionality of this relationship appears to depend on the type and timeframe of load measured
Background The relationship between training load and musculoskeletal injury is a rapidly advancing area of research in need of an up date d systematic review .