fitbit accuracy

The surprising reason why I haven’t been able to lose weight

The surprising reason why I haven’t been able to lose weightRemember when I signed up for the Tone It Up Bikini Series Challenge after the Phoenix Marathon in February, lost an inch or so, then gained it all back (and then some) a few weeks later?

I decided to do some research into why I’ve been struggling this time around to get down to my racing weight for the Goodlife Fitness Marathon in October, which I can usually do when I really put my mind and body to it. And although summertime BBQs, patio drinks and chips and salsa has contributed somewhat to my predicament, the surprising reason why I haven’t been able to lose weight comes down to approximately a handful of berries, a lick of peanut butter, and a couple more pieces of my daily dark chocolate quota (yes, I’ve started eating chocolate again – but not as much!) per day. So roughly 150-200 extra calories per day.

Those few extra nibbles a day (which I accounted for in MyFitness Pal) added up to a small weight gain and now maintenance, even though I’ve been in a small calorie deficit almost this entire time. Which wasn’t actually as much of a deficit as I thought, based on MyFitnessPal logging data from two years ago when I made a concentrated effort to lose weight. (more…)

How accurate is a FitBit at estimating calorie burn?

Photo(1)Last month, I did a little experiment with my FitBit Flex to see if being in a 250-calorie-per-day deficit actually does lead to half a pound per week of fat loss (because there are 3,500 calories in a pound of fat, so 7 days x -250 calories less per day = -1,750 less per week).

I tracked my caloric intake closely using MyFitnessPal in conjunction with my FitBit, and added in any workouts using calories tracked from my heart rate monitor (I burn much less than what my FitBit estimates, so I manually enter in these calories burnt and it recalculates), trying to stay within the range of a 1,750-calorie-per-week deficit. Here are the results:

 

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