It’s a physical impossibility. And here’s one of my favorite examples of someone who is 119lbs, lifts incredibly heavy weights, THE HEAVIEST, in fact, but she is dwarfed by every man near her. She is in the front frame (video here: https://www.instagram.com/p/ByuuuJyD6FR/), closest to us, which makes her appeaR MUCH bigger (they call this “out-angling”); yet she still looks tiny in comparison to the ref behind her. You’re going to gain “too much” muscle lifting a fraction of what this 119lb girl does? Don’t kid yourself.
There are a few hundred people on earth who genetically make very little myostatin, and even they can’t gain “too much.” Even childhood super athletes, who have the extreme advantage of epigenetic anabolism and extreme early sarcoplasmic hypertrophy can’t gain “too much.” Even steroid and GH users have a limit on how much food they can get into the body.
DEXA is a rude awakening for people. They find out that at a body weight of 150lbs they have less lean tissue than when they were 110lbs in adolescence. Avoiding intense exercise and heavy weight lifting is training to be weak, soft, and in a nursing home. You’ll be lucky if you MAINTAIN an ounce of muscle as you age.