Sources

https://www.quizz.biz/uploads/quizz/394985/12_3cgiy.jpg

http://www.soa-natation.fr/wordpress/wp-content/uploads/2014/09/Natation.jpg

https://s-media-cache-ak0.pinimg.com/originals/b5/6c/c4/b56cc4f42c7b840638d6b13b50319d6c.jpg

https://coursetstagesdenatationlyon.files.wordpress.com/2013/05/c08dd-img_0028.jpg

http://www.letelegramme.fr/ar/imgproxy.php/images/2012/12/16/1945031_13645617-sp0520-20121216-w001a.jpg?article=20121216-1001945031&aaaammjj=20121216

http://www.sportquick.com/administration/images/illustrations/NatationDosF.jpeg

http://i.eurosport.com/2014/11/23/1357923-29152357-2560-1440.jpg?w=1050

http://cdn.newsapi.com.au/image/v1/7ee867b8d149482444965a1d2967ee2c

http://www.teamgeneve.ch/team/wp-content/uploads/2016/08/Natation.jpg