2.Backstroke :
In the sport of swimming back is one of the four official styles for a long time and even call in many texts and still called "crawl despaldas" because it is an adaptation for swimming crawl despaldas, or vice versa.
It is characterized mainly by being despaldas and a reciprocating motion of the arms and legs (the movement of the legs in back is called back or shake shake dorsal), and by the peculiar shoulder movement that takes place during the swimming.
In the specialty sporting competition back style is the third fastest, very close to the butterfly, which is the second, but distant from the breaststroke which is the fourth. It competes at the world championships at distances of 50, 100 and 200 meters. Also nothing in second place in the 200 and 400 individual medley and first in the relay events of styles.
Backstroke technique:
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