Most people will experience a decline by 45,everybody I know in their 50's needs glasses to read comfortably.Bridging is supporting your weight on your head from various angles,I rely on a head strap and bands and some old ankle weights for extended sets.I would really love a Rogers Athletic 5 way,or the Atlantis that Poliquin likes.Years back Nautilus made a great one that allowed twisting resistance as well,never see them anymore.