@K.38 Understood. Once we get to the second half of life, the game changes (for most of us), and it is no longer about increasing weight. N.B. Let's keep in mind that celebrities like Stallone, Schwarzenegger, Dwayne Johnson are on more than organic oatmeal and fresh chicken breast. They're loaded with drugs.
The reason that I asked the question is this: In 2010, I worked with a trainer. Same guy who trained Will Smith for
Independence Day. I never became Mr Universe, but all of my knee and back pain disappeared. Just from training and, of course, eating the correct diet.