People with expat insurance policies may wish to engage in regular exercise, as it is thought that this can lower a person's risk of developing dementia.
"Couch potato time needs to be rationed", director of the Dementia Services Development Centre at the University of Stirling Professor June Andrews declared.
She asserted that "the evidence is there" to support a link between neurological degeneration and sedentary habits, although "it's not absolutely clear" why there is a relationship between the two.
Researchers at Baycrest in Toronto collaborated with the Universite de Sherbrooke, the Institut Universitaire de Geriatrie de Montreal and McGill University to discover cognitive health in older adults can be harmed by low levels of physical activity combined with high salt intake.
Their findings were published in the journal Neurobiology of Aging.
Professor Andrews hypothesised that this kind of lifestyle would lead individuals to become "depressed and listless", which may speed up the onset of dementia and increase its severity.
Working out "improves your blood flow", providing more oxygen to the brain, she added.