In the 1980s, a wave of devices hit the market promising to improve one’s flexibility. Among them was a contraption that became legendary...

If you’re taking medical advice from someone like me, you have more serious problems than can be addressed in a column. So it is that I never offer any advice on gaining flexibility. If you have questions about improving yours, consult a physical therapist. Unless your sensei has that kind of professional training, he has no business giving you instruction on flexibility other than to say, “This is what has worked for me.” That is what I would say. I can tell you, however, wh