I Have been looking into the proper way of taking blood pressure after I took my dot physical and was told my blood pressure was high. I started taking my own blood pressure and found out that it is normal (maybe a little high) . Your arm position during the test is very important . Your arm should be resting on a table. If your arm is not you will get a bad reading. My B.P. is 127/76 when my arm is resting on a table as in the web site. When I am seated and my arm is straight down it is 144/93. The numbers very about 20 points, between arm resting on and table and arm straight down. I also took my wife’s B.P. and hers very about 10 points. I got a 1 year card because I believe the Doctor took the B.P. wrong. Next time you get a Physical , watch out for this…… DISCALIMER I am not a doctor just a dumb driver Next time Doctor crazy- eyes will study the effects of florescent lighting when you are reading an eye chart.