So apparently Richard the Third didn’t have a hump back, but quite a case of scoliosis.
Scoliosis can be easy to detect in some students with a trained teacher eagle eye.
It can also be more subtle. I look for it in simple forward bends. In the deep forward bends you can detect it through uneven levels of the back ribs on either side of the spine. In standing, it can manifest as uneven shoulders and pelvis.
In some students it is not so easy to see and some people may not be award of it! If twisting poses feel real different from one side to the next, that could indicate a mild scoliosis.
Yoga can help to some degree even out the unbalance in the intercostals and such. Breath is important. The lungs are already uneven, so mild to severe can compress into one lung more than the other.
Apparently Rick had painful treatments for it back then. Could this have been the reason for the invention of the wrack?
Um, give me some side stretching, PLEASE.