Mental state can have a lot to do with it. I am not particularly overweight (could do with losing about 10 lbs.), don't smoke and walk dog every day. Under stress my blood-pressure soars - and by stress I mean almost any unusual anxiety. I know because, following a recent op. and alarm about my pressures, I checked with my G.P., who wasn't concerned given my regular checks. Anyway I bought a wrist monitor and I can register as low as 110/52 and as high as 158/86 in the course of a normal day. Awaiting the op. I was somewhere about 198/98. Hope this helps.