https://www.cnn.com/2025/07/28/health/alzheimers-disease-walking-exercise-wellness
I'm sure all these studies are good and absolutely movement is important. My own Father is starting to exhibit sure signs of sundowner's and random lost moments. At other times sharp as a tack, just talks slower. He's 81. He always took care of his cardio. Was random with his weight lifting. Slim build. Due to various reasons we've never been super close. I called him on Father's Day and we had a 20 minute conversation. Everything was fine and then around minute 15 he couldn't follow me at all. Shook me (and I didn't think it would). I had heard about him having random falls here and there. I'm going to visit him in August because I know once this stuff starts it never gets better.
I guess I'm saying obviously we should do the best we can regarding exercise, diet, e.t.c but there are no guarantees other than death one day. I know duh, that's no revelation. My Dad is the youngest of four brothers all still alive. Some have had cancer battles, one has a pace maker, all 3 drink. two of them heavily. Dad is a teetotaller. Yet Dad is the one developing quite obvious dementia symptoms. For all I know the exercise kept him from developing them earlier.
I resemble him physically more than any of my other siblings. So it spooks me that I'm looking at a similar fate at some point regardless of whether I exercise, take care of my diet, whatever.