Garmin vivosmart hr gps activity trackerthe vvosmart hr activity tracker uses elevate wrist heart rate technology to monitor heart rate at the wrist 247 that gives you the freedom to work out however you want with no additional heart rate strap needed using heart rate vvosmart hr provides calories burned information whether youre going for a jog playing a pick up game with friends or trying out a new boot camp class it quantifies the intensity of your fitness activities using intens