![]() And as different heart rates signify different stages of sleep, Fitbit can use this data to look at how well you're resting during the night.įor more details, see our piece on how fitness trackers monitor your sleep (opens in new tab). Through this method, the Fitbit is able to track your heart rate. There's a little LED built into the back of your Fitbit that flashes onto your wrist the Fitbit analyzes the light that bounces back from your wrist, to calculate how much blood is pumping through your body. When you haven't moved for a while, Fitbit will automatically assume you're asleep and start it's sleep monitoring process.įitbits can also monitor your heart rate. How do Fitbits track sleep?įitbits can track your movements with their in-built accelerometers and gyroscopes. But virtually every model released in the past few years is waterproof up to a depth of 50 metres, so they're great for a session in the pool. Some of the older models, such as the original Fitbit Ace, are only splash resistant, which means you can't swim with them. Los productos en oferta están sujetos a cambios durante el periodo promocional. The vast majority of Fitbits are waterproof. La oferta se aplica a una selección de productos de Fitbit en hasta agotar existencias. (Image credit: Future/Lloyd Coombes) Are Fitbits waterproof?
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