Multiple Hobbies Cut Dementia Risk 23% in 22,000-Person Study

6 articles · Updated · The Conversation · May 26

A Japanese study tracking more than 22,000 adults for 11 years found having at least one hobby in midlife cut disabling dementia risk by 19%, while multiple hobbies lowered it by 23%.
No single pastime stood out as best; physical, cognitive and social activities all showed benefits, supporting the idea that hobbies build cognitive reserve and help the brain cope with age-related decline.
Australian research echoed that pattern, linking writing, puzzles and computer use to a 9%–11% lower dementia risk, while creative activities such as knitting or woodworking were tied to about a 7% reduction.
Social connection appears especially important: social isolation accounts for about 5% of dementia cases, and one long-running study found less socially active older people developed symptoms roughly five years earlier.
The findings matter as dementia is Australia’s leading cause of death, affecting about 446,000 people now, with cases projected to nearly double by 2065.

If lifestyle can trigger early-onset dementia, which daily habits pose the greatest risk for younger adults?

Is our digital lifestyle quietly undoing the brain benefits of hobbies and increasing dementia risk for everyone?

Why do factors like hearing loss and diabetes pose a greater dementia threat to women than men?