Polar V800 athlete Kaisa Mäkäräinen follows her heart rate to reach peak performance

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Chasing your dreams takes persistence, courage, a lot of hard work and the right choices. Polar V800 helps twotime Biathlon World Cup winner and World Champion Kaisa Mäkäräinen make sure she trains smart. Discover more at Polar V800. Chosen by champions. , daretowin