Thank you for your post! I have many friends in their mid 80s. One man said a doc told him he shouldn’t run any longer because of a heart thing - so he walks - at about a 16 minute pace! Faster than I run at age 73. My other 85 year old friends still throw a bit of running into their walking, but they also swim, yoga and do some weights. So I’m hoping the answer for me is I can keep going - or keep going doing what I can doing knowing some stuff will change as I keep aging. I weight train, use a peleton and walking/running. I need to stay honest with myself and not let my ego push me beyond the limits that I have for that day. I don’t allow the “but I used to be able to do X, Y or Z.” I’ve got what I’ve got today. We keep moving forward!