Here is a short video of Ruth - soon to be 100. My real point of posting her video is to remind us all that there is a plateau waiting for us as we get older. If we are not disabled by chronic disease - which we can avoid - then we will likely playeau at about 80 and remain in the same state until we die. My bet is that Ruth has not "aged" much since then and will be the same until she dies.
So this is a possibility. But there is more. If you return with rigour to our Hunter Gatherer lifestyle in your 50's diet, activity and social - then you may plateau at that point. For that is our design
