Rhonda Patrick· PhD
If you're having higher frequency brainwaves that are not like the deep sleep, that's what we call unrestorative sleep, if you have a ratio of very little deep brainwave activity and a lot of high-frequency wake-like brain activity, what we call delta-beta ratio that predicts very bad cardiovascular outcomes, that if anything, your systolic blood pressure is even worse after sleep than it is the night before.