Can you describe what your body is going to feed like when you know you're getting old?

Ok, I am old so I can say this. My knee joints would hurt like hell after work. We had a lot of stairs I had to climb everyday at work, and I ended up with tendonitis. OUCH! I could hear my joints grind together. Grrrrr! Doctor to stop climbing stairs and take the elevator, no bike riding, no climbing steep hills.
Funny, after I moved to a warmer climate and did climb stairs any longer must have healed them up! No more painful grinder. Use
Can you describe what your body is going to feed like when you know you're getting old?
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