Using a Slant Board:
Is there anyone here that knows anything about the advantages or disadvantages of using an inversion gravity table commonly called a slant board. These slant boards are now available and their suggested use is as an aid to enhancing both mental and physical fitness by improving blood flow to the brain. One simply lies on a board that is contained within a tubular frame and the board rotates by selected increments to a vertical head down position. It is suggested the full vertical upside down position should not exceed 5 minutes per day. The benefits are an improved blood flow to the brain. There is a warning that anyone suffering from certain problems such as high blood pressure, glaucoma, diabetes etc etc should not use this board. Surely the brain would welcome a little extra blood as one ages and this would be a plus. However there might be underlying problems if the brain pressure is raised, but then again reclining upside down may not increase the pressure but only increase the flow.
How about say 30 degrees head down? Would that be OK. Any thoughts would be sincerely appreciated.