6
This content is rated TV-MA, and is for viewers 18 years or older. Are you of age?
Sorry, you are not old enough to view this content.

CNET News Video: How accurately do fitness trackers monitor sleep?

About Video Transcript

CNET News Video: How accurately do fitness trackers monitor sleep?

2:13 /

As the "quantified self" craze continues, fitness trackers have us obsessing over not only how active we are but also how soundly we're sleeping. How do the devices stack up against clinical sleep studies though? CNET's Sumi Das visits the Stanford Sleep Center for an expert's opinion.

[MUSIC] Fitness trackers not only count our steps and calories burned, many provide sleep stats. But can you trust that data? We asked an expert at the Stanford Center for Sleep Sciences. The reason why these devices are good is because it puts greater emphasis on. Sleep. Most adults in the U.S. are actually somewhat sleep deprived. But are they accurate? The devices offer relatively little data as compared to the gold standard for measuring sleep, polysomnography. Polysomnography is a collection of different. Physiologic measures that we use to define and characterize sleep. We start with EEG, which are little electrical wires tha measure your brainwaves. And it doesn't stop there. Prepping a patient for polysomnography takes close to an hour. It also includes measures like. A snore mic that'll be on your neck. Inside your nose and over your nose and your mouth to kinda record your breathing. Belts around your chest and your abdomen that will also record your breathing. Patients stay over night for these sophisticated sleep studies which require a slew of equipment. From muscle monitors to EKG machines. Fitness trackers, on the other hand, use accelerometers. They're not actually measuring sleep, they're measuring an indirect approximation of sleep through movement. In order to make these estimations of deep or light sleep, they are probably using an algorithm that. Takes into account the relative amount of movement that a person is having over the course of the night. Fitness devices have another key flaw. They can't precisely measure sleep latency. The time it takes to fall asleep. Both of them are really not very good at telling how long you're awake in the middle of the night. And your, your total sleep time relative to the amount of time that you're in bed. Still, there's value in paying more attention to your sleep habits. A lack of sleep can affect mood, ability to concentrate, and more. Fitness trackers motivate us to get our steps in, but they could help us get our z's in too. In Redwood City, California, I'm Sumi Das, CNET. COM for CBS News.

New releases

Tech to make your Super Bowl-watching experience even better
1:03 28 January 2015
Super Bowl 49 pits the Seattle Seahawks against the New England Patriots on February 1. Whether you're a die-hard football fan or just...
Play video
Mission Motorsport: Helping veterans through the medium of fast cars
8:12 28 January 2015
Wounded veterans can struggle after returning home, and to help with this Mission Motorsport offers former service men and women the...
Play video
Inside Scoop: Apple says Watch will ship in April, reports record iPhone sales
2:27 28 January 2015
Apple's bigger phones give the company its best sales quarter ever: 74.5 million iPhones sold. CEO Tim Cook also makes news with the...
Play video
The CraveCast learns what Mark Zuckerberg is really made of
44:45 28 January 2015
The Crave crew takes on the twisted side of the arts and sciences and science fiction, including Shakespeare, Star Wars, gravity failing...
Play video
Tomorrow Daily 119: Robot bats, real-life ad-blocking headset, a futuristic piano and more
24:47 28 January 2015
On today's show, we shudder at a robot bat that can easily switch between flying and moving on the ground, check out a headset that...
Play video
Google's looking to become its own wireless carrier
4:08 28 January 2015
Google plans to shake up the US wireless market, Project Ara could partner with Blocks modular smartwatch, and photos leak for the...
Play video
Black & Decker's stick vac can't rise above the pack
2:24 27 January 2015
It looks like an upright while maneuvering like a stick, but middling performance and tedious maintenance keep this vac grounded.
Play video
Turn Amazon Echo into a better music player
2:22 27 January 2015
If the Echo does one thing really well, it's play music. Find out how to do more than just play a single song.
Play video