Steve, I didn’t mind being quoted, and now that some folks will be wondering what I said, I’ll briefly repeat that a well-fitting PFD grips one’s rib cage and moves as one with the rib cage. Since the rib cage has no noticeable amount of differential movement within it, then being wrapped in a PFD can’t possibly interfere with rotation. And I mentioned that torso and arm movement are far more extreme when rowing, yet I have no problem with a properly-fitting PFD in that case either. And I mentioned there’s not that much rotation with rowing, but in thinking about it, that’s not true. I actually rotate as much as possible on a regular basis, even every few strokes at times, and sometimes every stroke when in tight quarters, just to get a good look at where the boat is headed. No PFD problems in that case either.