many of those that got on the stick that played a lot for years ended up with back problems.
So is it a surprise sport at its highest level is not for those who dream to become more healthy? No matter what is your obsession you'll have to sacrifice something ... especially if we're talking about the highest level. I graduated from the national university of physical education and sports of Ukraine where we studied quite a few biomedical subiects. Have you ever seen for example the heart of the sprinter or cyclist's lungs?... and what happens after they are retired ...but better back to the theme...
So the most best cueists I've seen ... especially in modern era ... are pretty low on the cue including those who are fairly tall... Klenty Kaci, Ruslan Chinakhov just to name a few ... even Mike Massey was not so high at his prime.
I'm 6'6" and when I played my best I was pretty low on most of the shots and yes I do have my portion of problems with my back and neck but when you're as tall and there is more load on your spine even if I don't play billiards or stand very high it does not guarantee I would not have any problems.
I just have to make certain exercises, workouts, visit massagist, some practicing, playing with the weaker (left) hand and so on.
That's why a lot of pros today ... no matter on their height ... do know the importance of being in good shape... going to gim, practicing some yoga, swimming and so on.
It is already several years I don't play tournaments due to different reasons ... but even now playing for some joy I'm pretty low especially for my height and of course there is no one stance suits all. It totally depends on the shot ... some shots are easier to visualize standing higher (kicking) on some power shots where I need more follow through again my head will be slightly higher and so on and on... The game and your results are great teachers).