Review: Garmin Vivoactive

Introduction and designMost smartwatches aren't all that great for people who actually exercise: runners, swimmers and cyclists. Without GPS, a watch is just left guessing your speed and distance based on how fast you move your arms. Even the ones that currently have GPS don't often make great use of it.Smartwatches with, ahem, athletic support such as this, the GPS-enabled Garmin Vivoactive, and Fitbit's Surge HR are out to fill the big gap between a basic fitness tracker band and true smartwat