C'est un article génial , en anglais certes mais à lire malgré tout :) 

" Laissez les enfants bouger , se lever ou marcher dans la classe . Vous verrez la différence " 

(Google trad pour ceux et celles qui sont les moins anglophones ;) ) 

 

Let children move around, stand or walk in the classroom. You'll see the difference

The question of "is sitting the next smoking" has been raised by many health experts in the past few months. Many ailments, including diabetes and heart disease, are known to be connected to an inactive lifestyle. However, most of this attention has been focused on adult office workers and the negative health impact of sitting at work all day.

http://theconversation.com