Lately I've been using an alarm clock that determines what phase of sleep you are in (light or deep) so that it waits until you are at a lighter sleep phase before waking you up.

It does this by using the microphone and motion sensors to determine if you are moving around or not.

I was wondering if there were a more accurate method of determining this and I was thinking that maybe the person's heart rate would have a noticeable difference between the different sleep phases, is this correct?

1 Answer 1


To have a really precise way to determine the sleep phase you must be under EEG beacuse HR is much more influenced by circadian rhythms as you can read here.


Your Answer

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge that you have read and understand our privacy policy and code of conduct.

Not the answer you're looking for? Browse other questions tagged or ask your own question.