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Titre : | Why do we suffer more ACL injuries in the cold? A pilot study into potential risk factors (2017) |
Auteurs : | Robert Csapo ; Ramona Folie ; Simona Hosp ; et al. |
Type de document : | Article |
Dans : | Physical therapy in sport (2017/1, January 2017) |
Article en page(s) : | p. 14-21 |
Langues: | Anglais |
Descripteurs : |
HE Vinci Proprioception ; Souffrance |
Mots-clés: | Refroidissement périphérique ; Laxité du genou ; facteur de risque |
Résumé : |
Objectives This study aimed to investigate temperature-related changes in different neuro-muscular parameters, to elucidate the reasons for the increased likeliness of injuries of the anterior cruciate ligament under cold environmental conditions. Design Repeated measures study design. Methods To induce peripheral cooling of the knee joint and thigh muscles, ten healthy, female subjects underwent 30 min of exposure to a cold environment. Both knee extensor and flexor muscles were examined for electromyographic activity, maximum voluntary contraction strength, rate of force development and force sense. Measures of knee laxity were obtained by computerized arthrometry. Results Following cold exposure, rate of force development of the knee flexor muscles was significantly reduced (p = 0.016). Left-shifts of electromyography power spectra indicated changes in neural drive to the medial and lateral head of the vastus muscle. Maximum strength, force sense and knee laxity were not affected by the intervention. Conclusion The reduced capacity of cold knee flexor muscles to explosively generate force may limit the hamstrings' capability to counter strong and fast contractions of the knee extensor muscles that cause anterior shear force on the tibia and, thus, strain the anterior cruciate ligament. |
Disponible en ligne : | Oui |
En ligne : | https://login.ezproxy.vinci.be/login?url=https://www.sciencedirect.com/science/article/pii/S1466853X16300608 |