

Overall, I’d say it’s a nice watch to hang on your bod. The tracker figures out your energy levels using a combination of data including heart rate, sleep, stress levels and activity from the previous few days so it will likely take a while to figure out how much output you’ve got before a workout. The body energy feature is also a nice touch. Compare that to the Fitbit HR and Charge 2, which last up to five days. The battery life is also strong enough to stay charged for up to a week at a time. It is safe to use under water so it can be worn in the shower or if you want to go for a swim. Like its predecessor, the vivosmart 3, the 4 comes with the ability to check the weather, play music, and receive text message updates. One other interesting feature includes stress level measurement tool that will remind you to relax and take a breath throughout your busy work day. The new model comes equipped with a newly redesigned wrist-based heart rate sensor, VO2 max and tracker for various activities like running, strength training and yoga. The material is smooth, soft and lightweight, slipping on easily. Its slim, fashionable design fits neatly on the wrist and comes in berry with gold bezel, powder grey with rose gold bezel, azure blue with silver bezel, and black with slate bezel. First off, this is a very nice looking piece of jewelry. I took the new vivosmart 4 for a spin this week and was not disappointed in the upgrades.

The blood oxygen sensor will tell you how well oxygen is being pumped from your heart to the farthest regions of your body and can help you figure out if you are getting a good sleep in.

You simply swipe through the menu on the display to get to your energy levels or a number of other data offerings like steps, heart rate, stress levels and stairs climbed. That new body battery energy calculator estimates the body’s energy reserves to help you figure out when you feel more rundown and why. This sleek new wristband not only tracks steps, activities and gives you the weather but also comes with a blood oxygen sensor and will tell you how much energy you have saved up for your next full throttle burn session. Garmin continues to go head-to-head with Fitbit with the launch of its latest offering - the vivosmart 4 activity tracker.
