Fitbit 2 Fitness Tracker As Accurate As Ever

Fitness tracker accuracy of Fitbit 2 is more accurate than others. This band uses an accelerometer to trace and record distance. During a walk, it measures 500 steps as 462, which is a bit less accurate than other fitness trackers, but not considerably so.

If you took the Charge 2 on a 3-mile run, whereas wearing the Garmin Forerunner 235 GPS running watch on other wrist. Here, the Fitbit over count your distance, giving you credit for having run 3.34 miles. The similar thing happened on a second run, but this isn’t too abnormal for accelerometer-only fitness trackers. Providentially, Fitbit allows you to fine-tune the Charge 2 by manually inputting your stride length. Still, if you want to accurately measure how far you’ve run, you’re going to necessitate a GPS watch, as we delineate in our guide to using tech to run a 5K.

The Fitbit 2’s heart rate monitor proves more fitness tracker accuracy. On your run, it measures your average heart rate at 150 beats per minute, with a maximum of 181 bpm. That’s pretty much in line with the Forerunner 235 (whose optical heart rate monitor I’ve tested to be accurate), which measured my average heart rate at 154 beats per minute, and a max of 182.

Additionally resting heart rate, the Charge 2 can also calculate approximately your VO2 Max score, which it dubs “Cardio Fitness.” VO2 Max is a gauge of the highest amount of oxygen your body can process through physical activity, and is generally considered a good measure of your overall fitness level. Though this feature has been available on higher-end GPS watches, but it’s nice to perceive it coming to lower-cost devices, and being made easy to get to the average person. Here, the Charge 2 estimated the score to be between 41-45, which is good for a male or female. It’s besides in line with the VO2 Max score as calculated by the Forerunner 235, which put it at 44.

Also new to the Fitbit HR 2 are guided breathing sessions, projected to help you calm down during stressful periods. You can do either a 2- or a 5-minute session, through which time the watch measures your heart rate, and instructs you to take breaths in and out according to a pattern it sets, which is indicated by an expanding and astringent circle on the screen. If you’re doing it right, little sparkles become visible. I didn’t feel especially Zen-like after a session, but I’m habitually a pretty relaxed guy. And the fitness tracker accuracy of this band gives extra relax.


Fitbit made a few tweaks to its already great app to make your data more reachable, and more user sociable. As with the older Charge HR, the Charge 2 has usual sleep tracking, which works as well as before. The Charge 2 thought I didn’t fall sleeping until 1:50 a.m., at which point I had already been counting sheep for a good 2.5 hours. Fortunately, you can edit your sleep log in Fitbit’s app after the fact, and you can regulate the sensitivity of the band’s sleep-tracking algorithm.