The GT3 helps track recovery times and adjusts your zone alerts quickly midrun—great for fartlek training and intervals. The manual is a little puzzling, but the payoff is worth the decoding time. cardiosport.com
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The GT3 helps track recovery times and adjusts your zone alerts quickly midrun—great for fartlek training and intervals. The manual is a little puzzling, but the payoff is worth the decoding time. cardiosport.com