Armour39 chest strap

Under Armour's current smart sportswear offering is the Armour39 chest strap, which tracks the user's heart rate, calories and workout intensity and combines the measures to produce a "WILLpower" score. The strap sends the data to the Armour39 app or watch. It's compatible only with Apple products.
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( Under Armour / May 15, 2013 )

Under Armour's current smart sportswear offering is the Armour39 chest strap, which tracks the user's heart rate, calories and workout intensity and combines the measures to produce a "WILLpower" score. The strap sends the data to the Armour39 app or watch. It's compatible only with Apple products.

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