There is further evidence for the long-term benefits of physical exercise in the reducing risk of cognitive decline in later life. Research indicates that a higher level of cardiorespiratory fitness (CRF) is associated with better cognitive function (measured in terms of better verbal memory and faster psychomotor speed) 25 years later.
Briggs, H. (2014). How running ‘may preserve thinking skills’. London: BBC Health News, April 3rd 2014.
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Zhu, N. Jacobs, DR. [and] Schreiner, PJ. [et al] (2014). Cardiorespiratory fitness and cognitive function in middle age: The CARDIA Study. Neurology, April 15th 2014, Vol.82(15), pp.1339-46. (Click here to view the PubMed abstract).