Sometimes Your Fitness Tracker Lies—A Lot

You did it -- 10,000 steps!

Yep, 10,000 steps in a single day.

Woo-hoo.

It’s now a daily accomplishment you celebrate along with millions of other people who track their activity with a wearable fitness monitor.

But is your fitness tracker really giving you accurate data – or just telling you what you want to hear?

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