Clearly, technologies work differently on different people as I am at pains to say whenever I show my workout-related oHR stats. It just goes to show that you can’t always take any single view or a single technology as being correct. “ they all overestimated REM sleep time“.Īs we’ve heard many times before, the sleep devices we use simply do not accurately measure sleep stages.the “A bility to estimate deep sleep was remarkably poor for all devices” and that.“ Measurements of light sleep obtained from WHOOP were much less biased and illustrated strong consistency between trials“.
Surprisingly when it came to sleep stage analysis the limited number of data points showed that At least that seems to tie in with what many of you often say. Interestingly the researchers found that “ Consistent trends across all devices were observed in their failure to determine the amount of time its user was awake rather than sleeping“. Also omitting EMFIT QS was somewhat strange as, in my opinion, it is the best consumer-grade sleep-tracking device. Even if I did buy them, I would like to have seen the researchers use significantly more people, significantly more data points and use newer devices which would give the manufacturers a fairer shot. At least I don’t believe they are representative results for the brands on test.