@cjj2 One word of warning. I recently had hip replacement surgery and my PT, who's known me for decades, warned me that my posture was deteriorating. My shoulders were rounding and I was starting to bend forward at the waist. A little Q&A revealed that I was sleeping too vertically, with my knees too high. It shortens the muscles in the front of your pelvis. She would have me lie on my stomach for five minutes on a hard surface. It won't feel good, because those muscles don't like being stretched...