I'm 19 and a half years old and I'm about 5 feet 7 inches tall. I'm really curious about any potential height growth I could expect by the time I'm 21, especially with exercise and a proper diet. I've heard some people talk about doing setups while sticking to a cart leg - is that something that's good or bad for height growth? Also, I've been told that I might only gain about half an inch to maybe 2 inches, but that's rare. Is there any truth to that? I just want to know what I can realistically expect.