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  - Situé dans le Ferlo, région du nord du Sénégal, le territoire étudié par l'OHMi Téssékéré est caractéristique du Sahel africain. Cette vaste zone de transition bioclimatique, entre le domaine saharien au nord et les savanes soudaniennes au sud, est caractéristique des crises écologiques et humaines consécutives aux épisodes de sécheresse qui touchent l'Afrique depuis plusieurs décennies.
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  - La région concernée par l'Observatoire présente tous les traits propres au Sahel (déficit pluviométrique, pression anthropique sur le milieu, modification des grands équilibres écologiques) et la particularité d’être au cœur d’un très important programme panafricain de développement et de reforestation, appelé Grande Muraille verte.
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Mots-cles	epidemiological transition

Porteur	Session	Titre	Mots-cles	Résumé	OHM(s) concerné(s)
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Stéphane Blanc	2017	Physical Activity Transition and weight: Study of the epidemiological transition of the Peuls around the Great Green Wall	epidemiological transition physical activity	Worldwide increases in urbanization with accompanying changes in patterns of dietary intake and energy expenditure have been implicated as the primary ecological drivers of the “obesity pandemic”. Public health organizations try to adopt strategies to combat excess weight gain. These strategies will include reduction of energy intake and an increase of physical activity, but understanding of how both environmental factors contribute to excess weight gain at the population level is an essential prerequisite. Lower prevalence of obesity in most developing compared with industrialized societies led to the assumption that energy expenditure differs between populations. We assumed that populations in developing countries have lower activity energy expenditure than in industrialized societies where people have more labor-saving devices, but there is little objective evidence to support this assumption. A lot of debate still exists in the literature on this topic and the lack of firm evidence likely comes from that fact that most studied populations had already finished their epidemiological transition numerous decades ago. Peuls in Senegal living close to the Great Green Wall are known to engage impressive amount of daily physical activities to follow their herds and to have very low body mass indexes. The GGW acts as a catalyzer of the transition from ultra-rural to medium-rural environments with an ultimate transition to urban conditions in Dakar. The objective of the project is to investigate the Peuls population around the GGW on real time the changes induced by an epidemiological transition on physical activity and its consequences on body mass.	OHMI Téssékéré		Afficher

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