Don’t let go of that exercise in some form or other. I am guessing you will make it to 100 age and may be much more.
Regarding seafood, I forgot to mention that mussels are an extremely nourishing form of seafood, and I have found them at Herris Teeter for under $5 a pound, shelled and precooked. Great to just add to soup or stew for the extra protein.
As for how long I’ll live, I will keep active as long as I can. My grandfather walked every day for an hour, then at 96 he was in some kind of accident, and could not walk much any more. He died at 98. However, two of his sisters lived to 103 and 104. On the other hand, my parents only lived to 90, but my mom had a defective heart valve replaced at age 78 and the pig valve they used were only good for about 10 years and she was too frail for surgery at 88. My father had high blood pressure and a bad temper, he never listened to me about learning to deal with frustration and his temper. He was standing in a long grocery line, wanting to buy food before driving 90 miles to collect overdue rent from a deadbeat tenant. He had a stroke and died 2 weeks later. So my big effort for the moment is getting my property fixed/reonvated, so I don’t have to worry about it when I am ten years older. Meanwhile I have plenty of painting, minor repairs, and gardening to keep me exercised.