Getting fitter, even if you aren't fit, and maybe haven't ever been fit, can have a big positive effect on dementia risk. Who knew? Today we have research to back it up. Gretchen Reynolds, writing in the Australian Financial Review has this on the latest research:
But the effect [of exercise] was larger than we thought. — Ulrik Wisloff
Perhaps more encouraging, those men and women who had entered middle age out of shape but then gained fitness showed the same substantial reduction in their subsequent risk for dementia.