He did a backflip out of the raft in a 3+ rapid, into a glacier melt river North of 60. He laughed when I was given control of the raft for the first time and I flipped it with him and five others in it within 30 seconds.
I'm willing to bet he will still be having a ball at age 80.
First link from a query of "exercise dementia": "Exercise Is Associated with Reduced Risk for Incident Dementia among Persons 65 Years of Age and Older" (http://annals.org/aim/article/719427/exercise-associated-red...)
Second link: "The effects of exercise training on elderly persons with cognitive impairment and dementia: A meta-analysis" (http://www.sciencedirect.com/science/article/pii/S0003999304...) (Conclusion: "Exercise training increases fitness, physical function, cognitive function, and positive behavior in people with dementia and related cognitive impairments.")
Overall the balance of the articles seem to indicate positive effects for exercise in both preventing dementia and even improving the prospects of people with dementia. This does not mean exercise is a "magic bullet" to completely preventing or curing dementia, but it seems like exercise helps.
Correlation is not causation. How many times do we have to repeat that? It could be that folks who are more physically active tend to have healthier habits as well due to their personality/behavior.
Let me quote what the study you linked said:
> However, the existing evidence does not prove that regular exercise is associated with a lower dementia risk.
Even your links say so.
Come on people
My grandmother is relatively fit, looks the same as she did 10 years ago. My grandfather is currently in hospital with his 3rd stroke, dementia, and diabetes.
Age just hits some people harder than others.
As someone who suffers an immune disease that simultaneously makes me unable to do strenuous exercise, and is also independently associated with "a host of other issues", comments like this actually make me quite angry. How can you possibly claim this demonstrates cause and effect?
It seems where I live, in the Bay Area, the men seem lucky to live to 65, even the ones that exercise. I don't know why. I sometimes think it's our stressful lifestyle, and not going to church?
I bet your grandparents live in the Mid-West? I spent a month in Joplin Missouri, and was astonished to see so many people over 80 doing just everything.
This one guy was over 90, and still driving his car to see his girlfriend in Florida. The first time I met him, he was working on my buddy's air conditioning, in a shack in his back yard. That shop was sweltering. He shook my hand, and he saw me look at his chest scar. "That's my second. I told the doc to out in a zipper."
I'm too depressed to look up stats. My neighbors are dropping like flies. It's just weird. They are all high income too?
http://sf.curbed.com/2016/4/12/11415526/san-francisco-san-jo...