Ian Dodkins (ian) wrote:
For flexibility, sit in seiza, then lean backwards (knees close together) and touch the back of your head on the mat. Relax and try and lower your shoulders down if you can - may take a while at first!
Although I can easily do this stretch without any problems, I no longer do it due to warnings from people who know better than me (nurses, body workers, physical therapists) who have said that the above stretch is bad for the knees.
I guess it's kind of like trying to close a book fully that has a pencil wedged in it (if you think about the knee being the spine/binding of the book, the pencil as your heel, and the end of the cover as your shoulder)...