Not sure where you read that, but I call BS.Question
Have you ever checked your Blood pressure right after getting up?
Mine is close to 140/80 and after sitting for 5mins it drops to 126/78ish
I looked it up and it says most have lower BP right after waking.
I am just wondering what others find who monitor theirs?
Mine is always higher when I wake and that is a common enough issue that some doctors recommend taking your BP meds when you go to bed at night. A disproportionately high percentage of heart attacks are early morning.