I have been engrossed in the Science of Yoga by William J. Broad. He explains the science behind yoga, from a historical perspective to modern yoga...the benefits as well as the risks. I was thrilled to read there is real science behind the claim that yoga can actually build bone mass to combat osteoporosis and osteopenia.
For the most part I have been lucky to have teachers that understand the risks, the necessity to protect the cervical spine with layers of blankets for support in postures like shoulder stand and plow. Today though in class that wasn't the case...I'll start bringing my own blanket, to take steps to protect myself.
Off again with stacks of books for the long plane ride, I really need to join the Kindle age or look for yoga poses that help with aches and pains of carry lots of books.