Some more support for why the Strong Survive from a year long study published in the Proceedings of National Academy of Sciences. It showed that exercise increased the size of the hippocampus and improved memory in older test subjects.
Generally, the hippocampus shrinks as you get older. This degrades memory and can lead to dementia. But those who exercise have a larger hippocampus and training causes it to grow, improving spatial memory.
This means it’s never too late to begin an exercise regime and more proof that exercise is critically important as you age.
You can read the study here.