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publicado em 25/08/2010 às 16h00:00
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Mouthwash with carbohydrates increases the performance of athletes

Scientists used a solution of water and derived from starch without flavor, maltodextrin called because the sweeteners had no effect

 
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Athletes may have better performance from the use of mouthwash with a carbohydrate
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Athletes may have better performance from the use of mouthwash with a carbohydrate

A group of scientists led by Asker Jeukendrup, exercise physiologist at the University of Birmingham, found out how athletes can improve their performance in intense sessions of exercise in about an hour, simply rinsing the mouth with a carbohydrate.

However, researchers warn that carbohydrates should be used for real. In this case they used a solution of water and a starch derivative tasteless, called maltodextrin, after they realized that artificial sweeteners had no effect.

Scientists say "it seems that the brain can feel carbohydrates in the mouth, even those with no taste. The sensors are different from those for sweet, and stimulate the brain to respond by encouraging the athlete." The team is among the first researchers to assess the effect of carbohydrates on cyclists during the activity.

According to them, many athletes rely on sugary drinks to keep them moving. But often, when blood is diverted from the stomach to the working muscles during intense exercise, drinks or foods cause stomach cramps. Thus, a carbohydrate mouthwash can be a way to get the same effect.

Muscles can use your glycogen, the storage form of glucose during long exercise sessions. "But if athletes consume carbohydrates, they may provide a new source of fuel for your muscles hungry," they explain.

This theory predicted that the carbohydrates had no effect on performance in shorter races, an hour or less. Muscles could not exhaust your glycogen so fast, and when the body metabolizes carbohydrates for fuel, the race would already be almost over.

In intense sessions of exercise lasting half an hour, the athletes were able to achieve higher speeds or keep exercising longer when they had drunk the solution with carbohydrates. Its performance improved by 14%.

In his research, Jeukendrup professional cyclists gave intravenous infusions of glucose or, as the control group, intravenous salt water before asking them to cycle as fast as they could for about 24 miles - or 38 km - about an hour. The intravenous glucose meant that the athletes had high amounts of sugar available instantly without the need for digestion. But this had no effect on their performance.

Then asked that cyclists do the same route, after rinsing the mouth with a solution of maltodextrin (or, as control, with water). "The results were amazing," said the researchers. Rinse mouth with carbohydrates have the same effect as drinking them.

The exercise researcher at the Institute of Research in Environmental Medicine U.S. Army, Scott J. Montain, believes the effect is real, but added that "competitors of resistance would be better off simply consuming the calories." Thus, Montain said, "they get the fuel from the truth, instead of dispensing a rinse and spit expensive and tacky."

Source: Isaude.net
   Palavras-chave:   Mouthwash    Carbohydrates    Athletic performance   
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