“Stand up, Bradley,” my mother used to say to me.  I slouched, my head hung forward.  I was a “lazy breather,” inhaling through my mouth.  At age 8, I felt timid, afraid.  Finally, at age 80, I’m standing up.  When I think of it, I tighten my lower belly, pull back my shoulders, and try to walk symmetrically.  Such a posture change helped rescue my hips from being replaced, and I feel more confident.  Thanks, Mom! Not that I am easily confident.  External forces –…