I’ve been using a Fitbit Surge to track activity and exercise for about five months now.

I’ve lost about 25 pounds in that time (would be better but I had a hiccup in November) so I don’t have a lot to complain about.

However after I shared a screenshot on Facebook of a 5-mile walk (not running just yet) I did on Thanksgiving, a friend who runs marathons commented that burning 1,000 calories (according to Fitbit) during said walk seemed really high.

I usually go for a 2-mile walk and average 3.5 mph and 130 bpm. Fitbit says I burn around 500 calories for the walk but that’s twice what a few different calorie calculators say I should be burning at 3.5 mph for the 34-36 minutes it takes me.

I’m just a little concerned that this fairly expensive devise isn’t being very accurate, which hampers me reaching my goals.