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GET INSPIRED. STAY MOTIVATED. FIND YOUR FIT. — Interval Training Made Easy With Fitbit Charge 2!
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The Fitbit Sense is a really good wellbeing tracker with some fitness smarts thrown in
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Fitbit Charge 4 Review | PCMag
Fitbit is not "HIIT-friendly" - Fitbit Community
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Fitbit Charge 5 Hands-On Review | Healthline
Torch fat quickly: a guide to interval training with wearables
