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| ID | Type | Description | Link |
|---|---|---|---|
| 2025-A00797-42 | Other Identifier | IdRCB |
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Among young athletes involved in pivot and pivot-contact sports (soccer, handball, rugby, etc.), lateral ankle sprains and lesions of the anterior cruciate ligament (ACL) are the most frequent ligament injuries. Despite existing prevention programs, these injuries lead to prolonged downtime, risk of recurrence and long-term sequelae.
A little-studied risk factor is proprioceptive rigidity, defined as the central nervous system's difficulty in adapting the use of sensory information (proprioception) according to environment and motor context. This deficit could limit the ability to maintain balance in high-risk situations, thereby increasing the likelihood of injury.
To our knowledge, there is no evidence of a direct link between proprioceptive profile (flexible/rigid) and the incidence of lower-limb ligament injury. If such a link is established, preventive strategies focusing on the recovery of an optimal proprioceptive profile could be developed in an attempt to limit the occurrence of ligament injuries in young elite and sub-elite athletes, and thus limit the medical, financial and personal repercussions for these athletes.
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| Label | Type | Description | Intervention Names |
|---|---|---|---|
| proprioceptive profile measurement | Experimental |
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| Name | Type | Description | Arm Group Labels | Other Names |
|---|---|---|---|---|
| proprioceptive profile measurement | Other | 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. |
| Measure | Description | Time Frame |
|---|---|---|
| Rate of occurrence of lower limb ligament injuries in groups of athletes with rigid proprioceptive profiles | Data collection on the occurrence of injuries will be carried out by club doctors, who will complete a questionnaire sent to them by e-mail by the investigator. They will then be contacted once a month by a single person to centralize the data. | During 1 year after inclusion |
| Rate of occurrence of lower limb ligament injuries in groups of athletes with flexible proprioceptive profiles | Data collection on the occurrence of injuries will be carried out by club doctors, who will complete a questionnaire sent to them by e-mail by the investigator. They will then be contacted once a month by a single person to centralize the data. | During 1 year after inclusion |
| Measure | Description | Time Frame |
|---|---|---|
| Describe the prevalence of rigid and flexible profiles in this population and according to the sport played (rugby, soccer, handball). | During 1 year after inclusion | |
| Describe the relationship between proprioceptive stiffness and the period of training or match during which the injury occurred (training or match divided into 4) |
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Inclusion Criteria:
Exclusion Criteria:
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| Name | Role | Phone | Extension | |
|---|---|---|---|---|
| Benoit ATTALIN, MD | Contact | +33467330565 | fed-medecinedusport@chu-montpellier.fr |
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| Facility | Status | City | State | ZIP | Country | Contacts |
|---|---|---|---|---|---|---|
| CHU Montpellier | Recruiting | Montpellier | France |
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Period of injury (1st, 2nd, 3rd or 4th quarter of training/match) |
| During 1 year after inclusion |
| Describe the relationship between proprioceptive stiffness and the period of the season | Period of season (1st, 2nd, 3rd or 4th quarter of season) | During 1 year after inclusion |
| Describe the relationship between proprioceptive stiffness and exposure time during training and matches | Number of hours of practice (training and match) | During 1 year after inclusion |
| Describe the relationship between proprioceptive stiffness and injury mechanism (contact/non-contact) | Direct (contact) or indirect (non-contact) injury mechanism | During 1 year after inclusion |
| Describe the relationship between proprioceptive stiffness and action during which injury occurs (attack/defense) | Action of injury (attack or defense) | During 1 year after inclusion |
| Describe the relationship between proprioceptive stiffness and occurrence of a first or recurrent injury | First episode or recurrence | During 1 year after inclusion |
| Describe the relationship between proprioceptive stiffness and time to return to sport at the same level | Time to return to sport at same level | During 1 year after inclusion |