Background The development of accurate measurement techniques to detect risk factors for common injuries should be of concern to health care professionals.
Objective To determine the contribution of a fatigue protocol to a risk factor screening test for the development of exertional medial tibial pain(EMTP).
Design 3D kinematic parameters were prospectively evaluated during a single leg drop jump (SLDJ) in both non-fatigued and fatigued state.
Setting: Female students in physical education were tested at the beginning of their first academic year and followed throughout 1–2 years.
Participants 69 healthy female students were included in the study.
Risk factor assessment Cox regression analysis was used to identify the potential risk of dynamic joint instability in the development of EMTP.
Main outcome measurements It was hypothesized that dynamic joint instability in frontal and transverse plane might play a role in the development of EMTP.
Results 21 subjects were diagnosed with EMTP. The results identified that for the leg at risk in non-fatigued state, only increased range of motion in the transverse plane (ROMT) of the hip during landing (P=.002) could be identified. In the fatigued state, increased ROMT of hip (P=.038) and pelvis (P=.040) during landing and increased ROMT of thorax (P=0036) during push-off could be determined. For the leg not at risk for EMTP, increased ROMT for the knee (P=.023) during landing and decreased ROMT for the pelvis (P=.034) during push-off were determined. These significant parameters could no longer be determined in the fatigued state.
Conclusions It can be concluded that adding a fatigue protocol to the SLDJ enhances the possibility to identify the leg at risk in a predisposed female athlete and determine the proximal risk factors for that leg at risk more thoroughly.
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