Walking for less than an hour, thrice a week can sharpen brain

​As per a study, physical activity like walking can increase the brain size. And for this you don't have to walk for hours everyday, just 40 minutes of walk only three times a week is enough to improve cognitive ability. Sounds fascinating right! The findings of the study have been published in the Proceedings of the National Academy of Sciences. The study was done in 2011.

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