Staying fit at any age.

I'm 74 with 2 metal knees and a back surgery. For our double nickel wedding anniversary my wife bought me the Sanjay Gupta book about keeping your brain sharp. She told me I said I would read it if I had it but I don't remember that. Good case for the book:-) I'm about halfway through it and I am getting a lot out of the book. Diet and exercise are everything for brain health. If it's good for the heart it's good for the brain. That said, I am still working almost full time and building another car. It gives me lots of exercise and I monitor my sleep, resting heart rate and number of steps per day with a Fitbit. I am height weight proportional and reading this book has me thinking about re-joining the gym that I belonged to when covid hit. I like the idea of problem solving on my job and my hobby and for the last 25 years I eat homemade vegetable soup for breakfast every morning. I recently cut sugar out of my diet as I was getting too much and you know------the book-----------
My mantra is use it or lose it but after an active day I do hurt all over. Peace----out-----DR