Remember Me
Or use your Academic/Social account:


You have just completed your registration at OpenAire.

Before you can login to the site, you will need to activate your account. An e-mail will be sent to you with the proper instructions.


Please note that this site is currently undergoing Beta testing.
Any new content you create is not guaranteed to be present to the final version of the site upon release.

Thank you for your patience,
OpenAire Dev Team.

Close This Message


Verify Password:
Verify E-mail:
*All Fields Are Required.
Please Verify You Are Human:

OpenAIRE is about to release its new face with lots of new content and services.
During September, you may notice downtime in services, while some functionalities (e.g. user registration, validation, claiming) will be temporarily disabled.
We apologize for the inconvenience, please stay tuned!
For further information please contact helpdesk[at]openaire.eu

fbtwitterlinkedinvimeoflicker grey 14rssslideshare1
Blache , Yoann (2012)
Publisher: HAL CCSD
Languages: French
Types: Doctoral thesis
Subjects: Lumbo-pelvic-hip complex, Vertical jump, Complexe lombo-pelvi-fémoral, Body model, Saut vertical, Modélisation, [ SDV.MHEP ] Life Sciences [q-bio]/Human health and pathology
The lumbo-pelvic-hip complex is an important structure of the human body. Its function of balancing the bodyhas been pointed out in many studies. While its motor function has rarely been investigated, especially duringexplosive movements involving a global extension of the whole body. Thus, the purpose of this work was to evaluatethe role of the lumbo-pelvic-hip complex during squat jumping. To this end, an experimental approach (kinematics,kinetics and electromyographic) as well as a simulation model of the musculoskeletal system have been used to analyzethe squat jump in the sagittal plan. The results show, firstly that studies which do not take into consideration the lumbopelvic-hip complex, lead to an overestimation of the mechanical work attributed to the hip joint during maximal squatjumps performed arms akimbo or with an arm swing. Secondly, the extension of the lumbar spine enabled by theerector spinae activation contributes to achieve a maximal vertical jump height. This result confirms the assumptionsabout the motor function of the lumbo-pelvic-hip complex and the erector spinae. Moreover, the contribution of thismuscle is increased when its maximal strength is enhanced and when the trunk is initially flexed. In conclusion, itseems relevant to take into consideration the lumbo-pelvic-hip complex when maximal squat jumping is studied. Thiswould also contribute to new training perspectives in order to improve maximal vertical jump height.; Le complexe lombo-pelvi-fémoral est une zone charnière du corps humain. Son rôle d’équilibration a étédémontré à de nombreuses reprises alors que sa fonction motrice, lors de mouvements explosifs requérant uneextension totale de la chaine articulaire, a été peu étudiée. Ainsi, l’objectif de ce travail a été d’évaluer le rôle moteurdu complexe lombo-pelvi-fémoral lors d’un mouvement de squat jump. A cet effet, une approche expérimentale(cinématique, dynamique et électromyographique) couplée à un modèle de simulation du système musculo-squelettiqueont été appliqués à l’analyse du squat jump dans le plan sagittal. Les résultats montrent, dans un premier temps, que lesétudes ne prenant pas en compte le complexe lombo-pelvi-fémoral conduisent à des erreurs de surestimation du travailmécanique attribué à l’articulation de la hanche lors de squat jumps avec ou sans balancé de bras. Dans un secondtemps, il apparaît que l’extension du rachis lombaire permise par l’erector spinae participe à l’atteinte d’une hauteurmaximale de saut. Ceci confirme l’hypothèse du rôle moteur du complexe lombo-pelvi-fémoral, soulignant égalementla contribution effectrice du muscle erector spinae, qui est accrue avec l’augmentation de sa force maximale et lorsd’une flexion initiale du tronc importante. En conclusion, il semble pertinent d’intégrer le complexe lombo-pelvifémoraldans l’analyse du squat jump en vue d’ouvrir de nouvelles perspectives d’entrainement visant à l’améliorationde la détente verticale.
  • No references.
  • No related research data.
  • No similar publications.

Share - Bookmark

Cite this article

Cookies make it easier for us to provide you with our services. With the usage of our services you permit us to use cookies.
More information Ok