Variability of spatiotemporal and leg mechanical characteristics during continuous single-leg hopping to exhaustion

Motor output during repetitive tasks is characterised by variability. Specifically, the effect of motor learning strategies used to improve motor performance, may change the performance (dependant variable) and the variability of the performance during a continuous task. However, the moment at which performance characteristics start to change before completion for continuous task has often been indeterminant. Change in spatiotemporal characteristics may be due to biomechanical or physiological adaptations. Determining the moment at which change in performance and biomechanical characteristics remains difficult. This way of specific interest to investigate during continuous task to exhaustion, during which there may be a change in performance and biomechanics. The purpose of this investigation was to evaluate the variability in spatiotemporal characteristic and vertical stiffness during single-leg hopping to exhaustion.