I just got back from the gym and it was surprisingly empty. Actually, more empty than normal.
My experience from lifting now for 30+ years and seeing thousands of people lift is it is:
1. Genetics.
Everything else is a distant second or third. This was actually something that was widely understood in 90s bodybuilding magazines. Lifting is mostly a display of genetics. That worked when you could sell magazines of genetic freaks working out. Without the magazines you have to sell all this nonsense like 1 gram per lb of protein. Even though I know the early research was 1 gram per kilo and then Americans just changed that to 1 gram per lb. I mean it is just such obvious nonsense that the optimal amount would happen to be the exact integer amount vs body weight that is easiest to remember, how convenient for people who sell protein lol. duh.
My experience from lifting now for 30+ years and seeing thousands of people lift is it is: 1. Genetics.
Everything else is a distant second or third. This was actually something that was widely understood in 90s bodybuilding magazines. Lifting is mostly a display of genetics. That worked when you could sell magazines of genetic freaks working out. Without the magazines you have to sell all this nonsense like 1 gram per lb of protein. Even though I know the early research was 1 gram per kilo and then Americans just changed that to 1 gram per lb. I mean it is just such obvious nonsense that the optimal amount would happen to be the exact integer amount vs body weight that is easiest to remember, how convenient for people who sell protein lol. duh.