Buy: From Amazon
The Polar RCX 5 isn’t a watch for the guy who just wants to count his steps or map how far he’s jogged. This is for the marathon man who also swims, bikes, lives, and breathes activity. The new Polar GPS tracking wristwatch tracks his heart rate, even in the water, and coaches him to train at the right intensity. It’s easily one of the top triathlon training watches in the world.
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