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Titre : | Lower extremity mechanics during landing after a volleyball block as a risk factor for anterior cruciate ligament injury (2015) |
Auteurs : | David Zahradnik ; Daniel Jandacka ; Jaroslav Uchytil ; et al. |
Type de document : | Article |
Dans : | Physical therapy in sport (2015/1, February 2015) |
Article en page(s) : | p. 53-58 |
Langues: | Anglais |
Résumé : |
Objectives To compare lower extremity mechanics and energy absorption during two types of landing after a successful or unsuccessful block in volleyball and assess the risks of anterior cruciate ligament (ACL) injury. Design Cohort study. Subjects Fourteen elite male volleyball players (aged 24.5 + 4.6 years; height 1.94 + 0.06 m; mass 86.6 + 7.6 kg). Interventions Subjects were required to land on force platforms using stick landing or step-back landing (with the right lower extremity stepping back away from the net) techniques after performing a standing block jump movement. Main Outcome Measures Vertical ground reaction force (body weight); knee flexion (degrees); knee moments (Nm/kg); and hip, knee and ankle energy absorption (J/kg). Results The right lower extremity showed a greater first peak of vertical ground reaction force, a greater valgus moment, lower energy absorption by the knee, and higher energy absorption by the hip and ankle joints during step-back landing. Conclusions The lower extremity may be exposed to a greater risk of ACL injury when stepping back from the net during the initial impact phase after a step-back landing. |
Disponible en ligne : | Oui |
En ligne : | https://login.ezproxy.vinci.be/login?url=https://www.sciencedirect.com/science/article/pii/S1466853X14000327 |