Hi,
I have recorded my blood pressure regularly for years because it suddenly spikes easily. In general before the last fast BP was 140-150 over 85-90 and I am 60yrs old. The week after a 13 day fast it was 110-118 over 73-84. My long term average continues to be 135/85.
I have argued for years that the home cuff machines are not accurate, but I now feel that they are too accurate and tend to give varying readings because of that. I no longer distrust the home machines.