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PDF) The validity of activity trackers is affected by walking speed: the criterion validity of Garmin Vivosmart ® HR and StepWatch ™ 3 for measuring steps at various walking speeds under controlled conditions
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Garmin Vivosmart 3 Fitness Tracker – verborgen OLED-touchscreen dat door stiek en behangen geactiveerd is, hartslagmeting aan de pols: Amazon.nl
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