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And if it was sufficient to sleep more to can "to give his / her / its 110%" during a sporty competition? It is what a small American étude1 that was interested in the hours of sleep of five members of the team of swimming of the Stanford University suggests, aged of 18 years to 22 years.

One first of all the swimmers asked to value their sporty performance during two weeks, following their normal habits of sleep. They had to increase their hours of sleep at 10 o’clock thereafter per day, during seven weeks.

Loss of time? On the contrary, the swimmers won of the time at the time of the competitions. They improved their time indeed to the 15 meters sprint of 0.51 second; their time of reaction on the second block of 0.15 and their departure turn of 0.10 second. Of the tenth of second that are extremely precious in competition. They also increased the speed of beatings of their legs, thus doing besides five beatings by cycle.

The athletes returned otherwise that they felt less tired, that they had more energy and were less sleepy during the day. Their mood and their alertness were also better.

These results corroborate those of other studies also carrying on the sleep and the athletic performances, among others at players of academic caliber basketball.

He / it does not therefore more that remain to hope that the athletes will not endure too much jet lag in China, at the time of the Olympic games.

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