![Garmin vívosmart 3, Fitness/Activity Tracker with Smart Notifications and Heart Rate Monitoring, Black ,Small-Medium : Electronics Garmin vívosmart 3, Fitness/Activity Tracker with Smart Notifications and Heart Rate Monitoring, Black ,Small-Medium : Electronics](https://m.media-amazon.com/images/I/71vyZdq-60L._AC_SX679_.jpg)
Garmin vívosmart 3, Fitness/Activity Tracker with Smart Notifications and Heart Rate Monitoring, Black ,Small-Medium : Electronics
![Amazon.com: Garmin vivofit 3, Activity Tracker with 1+ Year Battery Life, Sleep Monitoring and Auto Activity Detection, Black : Electronics Amazon.com: Garmin vivofit 3, Activity Tracker with 1+ Year Battery Life, Sleep Monitoring and Auto Activity Detection, Black : Electronics](https://m.media-amazon.com/images/I/51NJ7M89jeS._AC_SS450_.jpg)
Amazon.com: Garmin vivofit 3, Activity Tracker with 1+ Year Battery Life, Sleep Monitoring and Auto Activity Detection, Black : 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)