Runners and Injury Longitudinal Study: Injury Recovery Supplement (TRAILS-IR).

摘要

The Runners And Injury Longitudinal Study (TRAILS) is an ongoing two year prospective observational study funded through the USAMRMC Broad Agency Announcement mechanism (W81XWH-10-1-0455). It is designed to compare runners who sustain an overuse running injury during the observational period to those who remain injury-free on a discrete set of behavioral, physiological, and biomechanical variables. The proposed supplement will focus on injury recovery (TRAILS: Injury Recovery Supplement). It will enhance the parent project (TRAILS) by determining if the severity of an overuse running injury affects the duration of recovery (i.e., return to pre-injury weekly mileage), the magnitude of chronic changes in strength and gait mechanics that could be risk factors for early-onset osteoarthritis and mobility disability, and the association of injury severity with psychological well-being and pain. We plan to add 100 non-injured runners to our cohort of 200 runners that are enrolled in the parent grant (TRAILS). This will enhance the power of our aims for TRAILS and increase the number of potential injured runners to follow in our proposed Injury Recovery Supplement from 90 to 140. Our primary hypothesis is there will be significant direct relationships between the severity of overuse running injury and the magnitude of the change in strength, lower extremity joint loads, and psychological well-being from pre-injury levels despite a return to pre-injury training mileage. Determining whether the effects of a significant overuse injury are evident after the symptoms subside has important potential public health implications. It will inform whether a return to pre- injury activity is appropriate, if further treatment is required, and whether the injured runner exhibits chronic biomechanical and strength abnormalities that increase the risk of lower extremity osteoarthritis, and disability later in life.