Participating in certain physical and mentally stimulating activities may be protective against dementia, new research suggests. MedTwitter
To account for the potential delay in diagnosing dementia and risk of reverse causality, researchers used a 1-year lag time. They started the follow-up for each participant a year after the recruitment date.
Physical activity may decrease risk for dementia through improving cerebral blood flow and release of brain-derived neurotrophic factors, the investigators note. Another possible mechanism is through antioxidant effects that delay damage in the brain. This result reinforces the benefit of social contacts, as social isolation might result in faster cognitive decline, the researchers write. They add isolation may indirectly influence functions of brain through increasing the risk for cardiovascular disease andResults were similar for different types of dementia, and across income levels, sex, and age groups.
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