Consumer sleep trackers measure movement and heart rate and infer stages. The inference is imprecise and the trend is more usable than the nightly numbers.
Posting it because the silence on this was starting to look like agreement.
Topic summary
Sleep tracking data and its considerable limitations
This is a generated summary. It shows the 9 most-liked posts from a topic of 127, in their original order, with the accepted answer included where one exists. It is a reading aid and it will miss nuance — the full topic is the record.
The arithmetic in post #16 is right; the assumption feeding it is the part to check.
Two people in this thread mean different things by sleep and are disagreeing about the definition while believing they are disagreeing about the facts. Worth pausing to define it.
29 likes 9mo
Worth separating two things that post #19 runs together.
Energy and sleep needs: rapid weight loss increases real metabolic stress. Sleep needs might increase even though appetite for food has decreased. Prioritising sleep is prudent during active weight loss.
Not the answer, but possibly the question that gets there.
31 likes 9mo
a.teixeira, post #3: Fatigue during the day and poor sleep at night are different problems with different causes and get merged in most accounts here. Go to post
On post #45 — agreed on the reasoning, with one qualification.
The published data on sleep outcomes in this class is thinner than the volume of discussion, which is worth saying plainly.
Nothing above should be read as advice about what anyone else should do.
z.okonkwo, post #61: Apnoea monitoring: if you have diagnosed or suspected sleep apnoea, periodic monitoring (annually) during weight loss is prudent because severity changes. Go to post
Post #94 and I disagree about the size of the effect, not about the direction.
Stimulants and sleep: if supplementing with caffeine or other stimulants for energy during weight loss, timing and dose matter for sleep. Evening stimulant use interferes with sleep.
Adding it in case it saves somebody the afternoon it cost me.
Appetite suppression and nighttime eating: if nighttime eating was a pattern, appetite suppression changes that pattern. Sleep can worsen if nighttime waking is habitual and now there is no appetite-based reason to wake.
It is the sort of thing that seems obvious in retrospect and was not at the time.
29 likes 9mo
This is the sort of exchange that makes the archive worth searching.
30 likes 9mo
s.roos, post #116: Thank you for the correction. I would rather find out here than later. Go to post
Post #117 is the version of this I will quote in future. One addition.
Apnoea monitoring: if you have diagnosed or suspected sleep apnoea, periodic monitoring (annually) during weight loss is prudent because severity changes.
That holds under the stated conditions and I have stated them.
Read the full topic (127 posts)
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