BILATERAL ANKLE JOINT KINEMATIC VARIABILITY IN INCLINE DISTANCE RUNNING
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The study aimed to develop a biomechanical understanding of the bilateral ankle joint variability at touchdown and toe-off in modified treadmill running inclines. Bilateral two-dimensional coordinate data were collected and used to derive sagittal plane ankle plantarflexion at touchdown and toe-off in treadmill inclines of 1%, 3%, 5%, 9%, 12%, 15% and 18% for four male recreational runners. Individual inter-limb joint angles were examined using a coefficient of variation (CV%) and differences between „level‟ (1%) and incline running were assessed using a multiple one-way repeated measures ANOVA (P < .05). Increases in incline altered the bilateral kinematic and ankle joint variability responses at plantarflexion compared to „level‟ treadmill running in all participants. The CV% analysis demonstrated greater variability at ankle plantarflexion in the non-dominant limb at touchdown (CV% range; 1.09-3.33%) and toe-off (CV% range; 0.75-3.32%) compared with the dominant limb at touchdown (CV% range; 0.71-2.57%) and toe-off (CV% range; 0.76-1.73%) across all participants. In agreement with a dynamical systems perspective the findings suggest a greater predisposition of overuse injury in the dominant limb compared with the non-dominant limb. Participant-specific bilateral analyses of movement variability were advocated to extend insight into lower limb overuse injury potential in incline running.
- Masters Degrees (Sport) 
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