The Baltimore-based company describes Armour39 as a "first-of-its-kind performance monitoring system for athletes." Most likely, that means it will track and analyze users' physical activity and fitness the way competitors such as the Nike  Fuelband  and the Jawbone Up  do.
But unlike either the Fuelband or Jawbone Up, which are both wristbands, Armour39 is a full-body band (with a very dramatic light-up mechanism) you strap to your torso.
Under Armour says the device, which could help in the fight against obesity , will be available in the spring.
Watch the teaser for Armour39 above, with UFC fighter  Georges St-Pierre and fitness trainer Natalie Uhling.