The study, published The Journal of the American Medical Association show at the age of nine, children's physical activity an average of 3 hours a day. At age 15, physical activity they live 49 minutes a day and a half hours on weekends.
Research involving 1,000 children were also reveals even the most energetic child will experience a drastic drop when it reaches puberty. "The rate of decline was very surprising and dramatic," said lead investigator Dr. Philip R Nader.
Not revealed the cause of the decline. However, researchers noted the school is often a source of physical restraint when the kids grow up. Not only that, many schools have reduced physical education so that sport becomes more and more exclusive as children grow.
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