Relationship Between Proprioceptive Flexibility and the Occurrence of Lower Limb Ligament Injury in Pivot-contact Sports

"Proprioceptive profile is measured by assessing static bipodal balance on a force platform. The patient is asked to stand motionless in bipodal support on a stable and then unstable floor, with vision masked by an eye mask. The investigators randomly apply a tendon vibration (80Hz) to the subjects' Achilles tendons or paravertebral muscles.~This vibration alters proprioceptive information in the vibrated zone, leading to a disturbance in postural balance and an increased displacement of the center of pressure, whose position is continuously calculated from the force platform's sensors.~Thus, depending on the amount of displacement of the center of pressure, the investigator calculates a proprioceptive weighting ratio (PWR) to deduce the weight assigned by the Central Nervous System to the various proprioceptive inputs during the postural task.~An PWR of 1 indicates 100% use of information from the ankle, while an PWR of 0 means 100% use of information from the hip."