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Amazon.com: Garmin vívosmart 3, Fitness/Activity Tracker with Smart Notifications and Heart Rate Monitoring, Black ,Small-Medium : Electronics
![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] 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]](https://dfzljdn9uc3pi.cloudfront.net/2020/9381/1/fig-1-full.png)
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]
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