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Study: Exercise during childhood decreases chances of glioma (brain tumour)

Glioma is a type of brain cancer, statistically accounting for around 80% of all brain tumors and central nervous system cancers. However, there is not too much information available about the reasons for glioma, or the risk factors. One line of thought is that since the brain develops rapidly during childhood, environmental influences can affect the brain at this time. In a statistical study of the impact of exercise on these type of brain cancers during childhood, a study was conducted (and like all studies especially based on statistics, the data will need to be backed up with more information, and with more detailed studies). The study found that children who have had more exercise during their childhood have a lower chance of contracting brain cancer (link to article):

Although very less is known about the causes of glioma, researchers at the National Cancer Institute have found that this rare but often deadly form of brain cancer may be linked to early life physical activity and height. “Our findings suggest that biological factors related to energy expenditure and growth during childhood may play a role in glioma etiology. This clue could help researchers better understand important features of glioma biology and the potentially modifiable lifestyle factors that could be important in preventing this disease,” said Steven C. Moore, Ph.D., research fellow in the Nutritional Epidemiology Branch, NCI.
Participants who were physically active during adolescence had a decreased risk of glioma; their risk was about 36 percent lower than those who were inactive, according to the study. The researchers also found that those who were obese during adolescence had an increased risk of glioma; their risk was approximately three to four times that of individuals who were normal weight during adolescence.

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