Garmin Vivosmart HR+ review: Garmin's Vivosmart HR+ is a slim fitness tracker with GPS (hands-on) - CNET
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]
Garmin Vivosmart 4 (large) vs Garmin Vivosmart HR: What is the difference?
Fitbit Blaze vs Garmin Vivosmart HR Plus: What is the difference?