Fitbit help

shadow2soul wrote: »

Your adjustment isn't just exercise. It is the difference between what Fitbit tracked your TDEE to be and what MFP expected your TDEE to be.

The adjustment can go up or down as your day goes on.
If your set to Sedentary on MFP, you will see a large adjustment if you are not actually Sedentary.
If you set your activity level higher, you will most likely start the day with a negative adjustment that will slowly get smaller as you start to get closer to your MFP estimated TDEE.

Looking at your screen shots, Fitbit is doing exactly what it should be doing.

Example:
MFP expects me to burn 1639 calories in a day. Which is:
68.291 calories per hour
1.138 calories per minute

As of 10:01 am (my last Fitbit sync) Fitbit reported my calorie burn to be 731 calories.

Now, I have 13 hours 59 mins left in my day that Fitbit hasn't tracked yet.

Above, I broke down MFP's expected calories per hour and minute. Well this is where that part comes into play.

MFP sees that Fitbit says my calorie burn so far is 731 calories, but that I still have 13 hours 59 mins left to the day. So, MFP does some behind the scene math to predict what Fitbit is going to say at 11:59 pm tonight. The math:

13 * 68.291= 887.783
59 * 1.138 = 67.142
731 (Fitbit's burn) + 887.783 (MFP's estimate for 13 hours) + 67.142 (MFP's estimate for 59 mins) = 1685.925

So MFP estimates that Fitbit will say at midnight that my overall calorie burn was 1685.

My adjustment is then 1685 - 1639 = 46.

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I'm set to sedentary on MFP and under normal circumstances, I can easily get an adjustment of 500 +. That's because I'm not sedentary. Sedentary by step count is typically considered less than 5k steps in a day. If you take more than that, then you are not Sedentary. Fitbit adjusts your calories based on what it tracks your activity level to be. If you set your activity level low, you get a large adjustment. If you set it too high, it will take away calories or give you no adjustment (negative adjustments needs to be turned on for it to adjust down). I'll see if I can find the information about approximate step counts and activity level.


found it:
<5000 steps/day = 'sedentary
5000-7499 steps/day = low active
7500-9999 steps/day = somewhat active
>or=10000 steps/day= active
>12500 steps/day= highly active
http://www.ncbi.nlm.nih.gov/pubmed/14715035