Alzheimer's is a disease, you can get it in your 40s. If somebody recommends exercise to keep your legs healthy, they don't mean that if you have a staph infection in your legs that exercise will make it go away.
My grandfather had vascular dementia, and keeping him thinking and using his brain absolutely helped. Makes sense for a problem of blood flow that thinking new, hard stuff might direct some more blood supply to the brain.
Also, 1) you don't know for sure if you have Alzheimer's until you're gone, and 2) it seems that vascular dementia co-occurs with Alzheimer's a lot. So I can't imagine that it would ever be a good idea to stop using your mind if you felt it slipping.
My grandfather had vascular dementia, and keeping him thinking and using his brain absolutely helped. Makes sense for a problem of blood flow that thinking new, hard stuff might direct some more blood supply to the brain.
Also, 1) you don't know for sure if you have Alzheimer's until you're gone, and 2) it seems that vascular dementia co-occurs with Alzheimer's a lot. So I can't imagine that it would ever be a good idea to stop using your mind if you felt it slipping.