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Black Silicone Band Strap Bracelet Wrist Band&Tool Fits Garmin Vivosmart HR HOT | eBay
Amazon.com: Garmin vívosmart HR Activity Tracker Regular Fit - Black : garmin: Sports & Outdoors
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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 [PeerJ]