Should You Buy a Fitbit? 7 Questions to Ask Yourself Before You Do
Fitbit Official Site for Activity Trackers & More
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What is a Fitbit? What Does it Do, and How Do I Get Started? - LalyMom
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Does Fitbit Work to Track Sleep Apnea? – ApneaMed
12 Not-So-Obvious Things to Know About Your Fitbit Tracker
How FitBit Works | HowStuffWorks
Does your fitness band really work? Scientists analyse the tracking tech and find Fitbit and others 'no more effective than a pedometer' | Daily Mail Online