Your fitness tracker may claim to measure your sleep, but how accurate is it? To find out, sleep specialist Dr. Christopher Winter tested several popular trackers in a one-night sleep study in his lab.
He strapped the Fitbit Flex, Jawbone Up, and Basis
Chrome to his arm, along with an iPhone running the "24/7" activity
tracking app, and a $600 research-grade activity tracker called the Philips Actiwatch Spectrum.
Of the consumer models, only the Basis accurately tracked sleep and waking time, and detected two out of three REM
cycles. Dr. Winter writes, "I am floored that this device accurately
staged sleep based solely upon wrist inputs." (It doesn't even require
the user to put it into sleep mode.)
Results
from the other devices were less impressive, not matching up to actual
awakenings or sleep stages. Of course, it's only a one night study done
by one man, but the results are quite interesting. Check out the full
article below for a graph of the results.
Personal Sleep Monitors: Do They Work? | Huffington Post