Fitbit Charge HR

Also: Biodegradable implant accelerates nerve damage repair; algorithm uses wearables to predict behavior, blood pressure changes.

Wearable activity monitors could be useful in assessing the health of cancer patients and making predictions about mortality and adverse events, according to a study published last week in Nature's Digital Medicine partner journal.

Fitbit is facing yet another class action suit, this time over its heart rate monitoring, which plaintiffs claim is inaccurate to a dangerous degree.

Raleigh, North Carolina-based heart rate sensor company Valencell is suing both Apple and Fitbit over alleged patent infringement, and is accusing Apple of additional deceit as well.

Fitbit Surge Fitbit has added a new functionality to its Fitbit Charge HR and Fitbit Surge trackers that will enable the device to readily distinguish between different kinds of movement, and has also upgraded the heart rate sensors in the trackers.

Fitbit Surge Fitbit sold 4.

The commercial availability of the Apple Watch has not significantly affected Fitbit's sales, according to a report from Slice Intelligence, which aggregates data from online e-receipts.

The new heart rate-enabled devices Fitbit announced in October have begun shipping and are now available for purchase online, the company announced.

Just a week after news leaked about activity tracker maker Fitbit's next generation of devices, the company has announced its three new trackers -- Charge, Charge HR, and Surge.

Fitbit Force This week there's a new report about leaked details of an upcoming Fitbit device -- this is the third device that has leaked from Fitbit in recent weeks -- The Verge reports that the Fitbit Surge will cost about $250 and will offer GPS-enabled distance tracking, heart rate sensing, and call and text message notifications.