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Your fitness tracker might hold the cure to cancer

Fitness trackers have come a long way from their simple step-counting days. Nowadays they track all manner of health stats — from heart rate to hours of REM sleep to blood oxygen levels — all conveniently stored in a snazzy app on your phone. But have you ever wondered what exactly they do with all that data collected? Well, in the case of Fitbit, they’re using it to find a cure for cancer. Turns out, that device on your wrist is playing a pivotal role in helping doctors and scientists understand how exercise can help prevent, manage and reverse a range of diseases, including cancer. Since 2012, scientists have published 457 studies using Fitbit device data, focusing on everything from the role of exercise in increasing mental ...