Being physically fit at age 18 is linked to a higher IQ, a new study finds. The researchers also show that fitness predicts greater educational and professional achievements later in life. Earlier studies have found links between physical fitness and intelligence(智力)in animals, children and older adults. But the relationship in young adults hasn't been clear.
In the new study, researchers used data(数据)to examine over 1.2 million young men born in Sweden between 1950 and 1976. All the men had their physical fitness and intelligence assessed(评估) at age 18. The researchers compared this information to details of later achievements in academic(学术), social and economic aspects from other national databases and made some findings.
Fitness in the 18-year-olds was strongly linked to scores on intelligence tests. "Being fit means that you have good heart and lung capacity and that your brain gets plenty of oxygen, '' says Dr. Michael Nilsson of the University of Gothenburg. "This may be one of the reasons why we can see a clear link with fitness." The researchers also found that fit teens were more likely to get a university degree later in life. Fitness at age 18 was also linked to landing better jobs, with higher pay or management responsibilities.
The findings point to the importance of encouraging physical fitness in teens. "If so, physical education is a subject that has an important place in schools," says Dr. Maria Aberg of the University of Gothernburg.
