Sleep experts are skeptical that accelerometers in most wearable fitness trackers can truly distinguish sleep states or even know when you're just lying down but awake. Live Science Senior Writer Rachael Rettner tells why.
Sleep experts are skeptical that accelerometers in most wearable fitness trackers can truly distinguish sleep states or even know when you're just lying down but awake. Live Science Senior Writer Rachael Rettner tells why.
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