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30 octobre 2024
- ISIDORE Id: 10670/1.80acc5...
- mnhn-04760985
- doi: 10.1017/ehs.2024.25
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info:eu-repo/semantics/altIdentifier/doi/10.1017/ehs.2024.25
info:eu-repo/semantics/OpenAccess
Mots-clés
Infant-carrying nomads women kinematics kinetics Infant-carrying nomads women kinematics kineticsSujets proches
Womyn Wimmin Woman Womon Human females Kinetics Kinetics Analytical mechanics Kinetics Dynamical systems Women's workCiter ce document
Zohreh Anvari et al., « Infant-carrying mechanisms in a natural environment: the case of Qashqai nomad », HAL SHS (Sciences de l’Homme et de la Société), ID : 10.1017/ehs.2024.25
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Résumé
Infant carrying and more generally load carrying may impact bipedal locomotion and thus the energy cost of the daily activities, in living people but also in our ancestors. In order to improve our knowledge of infant carrying strategies we investigate the biomechanics of infant carrying in a non-mechanised group. The Qashqai are nomadic people who still carry loads and infants habitually without any daily assistance in varied natural environments. Our analysis focuses on the sagittal kinematics using a high-speed camera (joint angles, speed, position of the centre of mass) and kinetics (ground reaction forces and displacement of the centre of mass) using a six-degree of freedom force plate. We assessed the unloaded and loaded (infant) walking of 26 Qashqai women, living in the Fars province (Iran). The results demonstrate that different mechanisms of walking exist that are related to the mode of carrying and the weight of the infant, by which step length, walking speed and the lower limb angles are not affected. The displacement of the total centre of mass remains unchanged. This supports the hypothesis that the Qashqai have developed mechanisms of load carrying that limit the increase in energy consumption. This could be related to the usual high level of daily activity.
