I've been using a Garmin Vivofit since December. I switched from Fitbit because I like the display on the Garmin.

The majority of walking and running that I've done so far has been on the treadmill. I do swing my arms when I walk or run as well. I noticed that the accuracy is always wrong, in that it doesn't track enough steps or miles. Yesterday I did a St Pat's day run (5 miles). Prior to the run I probably walked close to 1/2 mile. At the end of the run I checked my Vivofit and it only had me at 4 miles!

Anyone know what I need to do to make it more accurate. I realize activity trackers are not 100% but this is really off.

Thanks!

My Vivofit is pretty accurate. Yesterday I hiked 9.5 miles based on the trail maps. My vivofit was close @ 9.46 miles.