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A prospective study on gait-related intrinsic risk factors for lower leg overuse injuries
  1. Narmin Ghani Zadeh Hesar (narmin.ghanizadehhesar{at}ugent.be)
  1. Ghent University, Belgium
    1. Ans Van Ginckel (ans.vanginckel{at}ugent.be)
    1. Ghent University, Belgium
      1. Ann M J Cools (ann.cools{at}ugent.be)
      1. Ghent University, Belgium
        1. Wim Peersman (wim.peersman{at}ugent.be)
        1. Ghent University, Belgium
          1. Philip Roosen (philip.roosen{at}ugent.be)
          1. Ghent University, Belgium
            1. Dirk DeClercq (dirk.declercq{at}ugent.be)
            1. Ghent University, Belgium
              1. Erik Witvrouw (erik.witvrouw{at}ugent.be)
              1. Ghent University, Belgium

                Abstract

                Objective: To prospectively determine gait-related risk factors for lower leg overuse injury (LLOI).

                Design: A prospective cohort study.

                Setting: Male and female recruits from a start-to-run (STR) program during a 10-week training period.

                Participants: One hundred thirty one healthy subjects (20 men and 111 women), without a history of any lower-leg complaint, participated in the study.

                Interventions: Before the start of the 10-week STR program, plantar force measurements during running were performed. During STR, lower leg injuries were diagnosed and registered by a sports physician.

                Main outcome measurements: Plantar force measurements during running were performed using a footscan pressure plate (RsScan International).

                Results: During the STR, 27 subjects (5 male and 22 female) developed a LLOI. Logistic regression analysis revealed that subjects who developed a LLOI had a significantly more laterally directed force distribution at first metatarsal contact and forefoot flat, a more laterally directed force displacement in the forefoot contact phase, foot flat phase and at heel-off. These subjects also had a delayed change of the center of force (COF) at forefoot flat, a higher force and loading underneath the lateral border of the foot, and a significantly higher directed force displacement of the COF at forefoot flat.

                Conclusions: These findings suggest that a less pronated heel strike and a more laterally directed roll-off can be considered as risk factors for LLOI. Clinically, the results of this study can be considered important in identifying persons at risk for LLOI.

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