Tools for tracking and fine-tuning our fitness regimens are more abundant today than ever. And they're getting smarter, too. From the simplicity of mechanical step counters to ultra-smart digital devices that pack accelerometers and GPS radios to...via Engadget RSS Feed http://www.engadget.com/2014/08/03/gadget-rewind-fitness-and-activity-trackers/?ncid=rss_truncated
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