Article

Knee stability during a functional assessment of the stop-jump task is a key
factor to determine if an athlete is adequately rehabilitated after knee
ligamentous injury. This study aimed to investigate knee stability due to the
effect of anticipation on landing maneuvers during planned and unplanned
stop-jump tasks. Knee kinematics of ten healthy male participants were collected
using an optical motion analysis system during stop-jump tasks. Stop jumps were
performed in four different landing positions either in planned movement or in an
unplanned movement on a signal triggered as participants passed through a
photocell gate. Kinematic data at the time of foot strike at landing in the
stop-jump considered for investigating the anticipation effect during the
stop-jump tasks. Two-way multivariate analysis of variance (MANOVA) with repeated
measures and stratified paired t-tests were conducted to compare the knee
kinematics data between planned and unplanned tasks. Statistical significance was
set at the p<0.05 level. External rotational angle showed a significant decrease
in unplanned stop-jump tasks during forward (p<0.05) and right (p<0.05) jumps
when compared to that of planned tasks. Flexion angle and abduction angle during
forward, vertical and right jumps were significantly decreased in the unplanned
tasks. Anticipation significantly influenced the landing maneuvers of stop-jump
task. The results indicated that both planned and unplanned stop-jump tasks
should be considered when monitoring the rehabilitation progress after a
ligamentous injury.
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Langue : ANGLAIS