Date of Award
Andrews, David (Kinesiology)
Health Sciences, Rehabilitation and Therapy.
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The purpose of this study was to investigate the relationship between ankle joint rotational stiffness (AJRS) and localized muscle fatigue on tibial response parameters (TRPs): peak acceleration (PA), time to peak acceleration (TPA), and acceleration slope (AS). The right leg of 15 male and 11 female runners was impacted using a human pendulum apparatus in both non-fatigue and fatigue conditions across a range of ankle angles (0%, 20%, 40%, and 60% of maximum dorsiflexion angle). No differences in TRPs were found between non-fatigue and fatigue conditions, or between sexes. Overall, a positive relationship was found between AJRS and PA, as well as AJRS and AS, while a negative relationship existed between AJRS and TPA. It is proposed that an optimal amount of AJRS is needed when regulating the transmission of impact shock as a tradeoff between optimizing joint stability and possibly preventing injury resulting from impact.
Nolte, Nikki, "The Effect of Ankle Joint Rotational Stiffness and Localized Muscle Fatigue on Tibial Response During Impact" (2011). Electronic Theses and Dissertations. 269.