Wearable tracker maker Mio Global has a new fitness metric called Personal Activity Intelligence based on your unique heart rate data. Personal tech columnist Geoffrey A. Fowler takes PAI for a ...
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Walking: Make it count with activity trackers
Walking is a great way to get and stay fit. But are you doing enough to see results? Using activity-tracking devices and apps can help you set and reach your fitness goals. See how these tools can get ...
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