Today, Under Armour previews Armour39, an all new, “first of its kind performance monitoring system for athletes.”

Armour39 tracks, analyzes and reports to you how hard you’ve worked.

Stay tuned to Armour39.com for coming news and details about this technology arriving Spring 2013.

Watch this sneak peek video starring UFC Welterweight Champion Georges St-Pierre and leading fitness trainer Natalie Uhling now.