Battery mileage may vary, of course, but according to Garmin, the Forerunner 35 should last for about a week and a half in smartwatch/activity tracking mode. In training mode, the company estimates about 13 hours of battery life, so even with the heart rate monitor and GPS tracking enabled, users should be able to complete a 50-mile Ultramarathon without needing to stop for a charge.

For users whose daily workouts don't involve such feats of endurance, the Forerunner 35 comes equipped with multiple sport profiles to track walking, indoor running, cycling, and cardio activities. Naturally, it also tracks all the metrics you'd expect from an activity tracker in 2016, like steps, calories and workout intensity. In and out of the gym, the Forerunner can also handle your phone notifications and music controls, plus the device automatically syncs with Garmin Connect to upload workout stats. In other words, it's a Vivosmart HR in a smartwatch body.

The Forerunner 35 is expected to hit the market during Fall 2016 with a $200/£170 retail price, and comes in four colors: black, limelight, frost blue and white.