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January 22, 2014 02:52 am GMT

Hands-On With The New Basis Sleep Tracker

rem-basis-exampleOne of the most popular wrist health trackers, the Basis B1 smartwatch, has added sleep cycles to variables it automatically tracks. I got my hands on an early beta version (which is now publicly available) and have been comparing it for the last week to other popular sleep trackers on the market. The upshot: of all the consumer-grade sleep trackers, the Basis is easily the most sophisticated. It tracks light, deep, REM, and sleep interruptions, and conveniently displays the totals in a daily dashboard. Waking up feeling refreshed is one of the best things in life. Quality of sleep may be just as vital to peak cognitive performance as the duration. Relatively uninterrupted sleep with long bouts of rapid-eye movement (REM) may be important inboosting creativity, good memory, and weight loss. Basis claims its sleep tracking system is be more accurate than the competition, such as the Jawbone Up and Fitbit, because it can track resting heart-rate, which is known to correlate with various sleep states. “We aren’t making a claim we can replace sleep labs or can be as accurate,” Basis representative Damon Miller said. “But we feel we are in a good proximity for a consumer product.” So can your heart rate really tell Basis how well you’re sleeping? Yes and no. “Heart rate is not the same as brain waves. And brain waves tell us what stage of sleep we’re in,” said Dr. Lisa Meltzer, a sleep researcher at National Jewish Health hospital in Denver. That said, compared to the competition, Basis did give me a more nuanced view of my sleep cycle, which could be quite valuable. Last Monday, Jawbone says I got 4:15 of light sleep, compared to 3:08 with Basis. Combined REM and deep was 2:53, compared to 2:05 total deep with Jawbone. Basis claims I woke up two times, with Jawbone claiming I woke up once. There are a few important caveats. With the Basis, all of this is automatically recorded. With the Jawbone, I had to manually input my sleep times after the fact, which is just something I could remember to do on a regular basis. I also have to remember when I fell asleep. On the other hand, I was up for about 20 minutes early on Martin Luther King day, before drifting back to bed for another hour. Basis says this next bout was 100 percent light sleep, while

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