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TOPIC: Fitbit adjustment questions

 
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October 3, 2012 9:58 PM
Why are my exercise calories trickling down as the day goes by? Can someone explain why FitBit thought this would make sense? If I already burned calories for the day why are they being taken away from me?
October 4, 2012 4:13 AM
The same thing happens to me, usually though I catch it the next day after it 'adjusts' my calories burned way below what it said before I went to bed for the previous day and then I end up being over my calorie goal (for the previous day) instead of under..

It is VERY frustrating...
October 4, 2012 7:21 AM
Well mine still appears to be giving me double credit for exercise. SIGH.
  13121380
October 4, 2012 8:37 AM
QUOTE:

Why are my exercise calories trickling down as the day goes by? Can someone explain why FitBit thought this would make sense? If I already burned calories for the day why are they being taken away from me?


Based on the formula MFP says it's using for the Fitbit adjustment, it appears that the adjustment is allocated using an assumption that whatever burn you've had so far for the day, will continue for the rest of the day.

So, for a concrete example, assuming a synch between fitbit and MFP at 1:00 and 3:00:
Let's say when it syncs at 1:00, you've been burning on average about 10 calories/minute so far that day. MFP extrapolates out how many calories you'll burn if you continue at that rate throughout the day and gives you an adjustment for the day based on that assumption. Then, let's say you're not very active between 1 and 3 so that your average for the whole day now drops down to 8 calories/minute. At 3:00, MFP extrapolates again how many calories you'll burn if you continue this new rate throughout the day and gives you a new adjustment for the day. This will result in a drop in the fitbit calorie adjustment from the one that was entered at 1:00. (this is an over simplification, but illustrates what's going on).

This works pretty well, if you tend to burn at a steady rate throughout the day. But if you're more active early in the day than later, you'll be allocated too high an adjustment early on and will see it drop throughout the day. And the reverse will be true if you are more active later in the day -- too low early on and adjusted up later.

Personally, I'd prefer to get a Fitbit calorie adjustment ONLY if my calories burned (reflected at Fitbit) exceeds my assumed calorie burn at MFP (based on my settings for weight, activity level, etc.). But I can see that this doesn't work for people who want to see what their estimated additional calorie allotment will be and not have to wait, possibly until late in the day, to be told they can afford extra calories. I've learned to make adjustments in my head for high Fitbit allotments that I know are the result of early high activity that won't continue throughout the day.
  23166008
October 4, 2012 3:50 PM
Hello,
I have been trying to use my FitBit for about a month now and I just have no idea what I am doing. I hate that electronics no longer come with instructions...

On my page, I keep seeing a FitBit Adjustment of either 0 or 1 under Calories Burned. But on the FitBit, it shows 900. I'm confused.

And I'm assuming when it says 5 for stairs, does that mean 5 flights? Because I go up and down a lot of stairs daily. I don't slow down, I go quickly and I feel like it should count.

And I can't figure out the stop watch part. When I try to start and stop it, it cancels everything for the day.

And is it supposed to have the date? I thought it was, but I don't see it.

Please help. I think I'm going to like it but right now, it just bogles my mind.
October 6, 2012 5:58 PM
QUOTE:

Hello,
I have been trying to use my FitBit for about a month now and I just have no idea what I am doing. I hate that electronics no longer come with instructions...


There's a Fitbit Users group here at MFP. There are some people there who really understand how it works and are very helpful. You might try posting your questions there:
http://www.myfitnesspal.com/groups/home/1290-fitbit-users
  23166008
October 7, 2012 3:03 PM
Thank you thank you thank you!
October 7, 2012 7:11 PM
I just started using MFP with FitBit. I have been using LoseIt prior to MFP. I don't enter any manual exercises into either MFP or LI, I just let FitBit track my activity and sync it to each app.
LoseIt doesn't let you enter an activity level, it just uses your demographic info. I chose Sedentary in MFP.
Today I walked about 14,000 steps.
The FB adjustment for Lose It is 418, but for MFP, it is an unrealistiicaly high 1161!
418 is definitely more accurate in my opinion.
if I ate all the calories that MFP says I can, I would gain weight.
This is not double counting, because I just put my FB in my pocket and don't use the stopwatch, and I do not manually enter any exercises into MFP or LoseIt or FB. I also do not enter any food into FB.
I also put the same height, weight, age and gender and goal weight into both apps.
I just enter food into MFP and sync my FB.
Why is the MFP FitBit adjustment so much higher than for Lose It?
October 9, 2012 2:33 PM
OK guys please help out...I am sooo confused with this fitbit calorie adjustment thing in regard to my fitbit and MFP. for example, first of all I feel like it adjusts my calories way too much. that is kinf od besides the point though....heres a question.
if i have my goal set at 1500 for a day and it adjusts me lets say 1000 based on my walking and daily activity, i can now eat 2500 right? technically? also, and maybe more important is this....if i have goal at 1500, it then lets say adds 1000 for daily activity. i then put in a cardio activity such as cycling where i burn 700 calories in an hour for example....does the fitbit calorie adjustment take into account this calorie expenditure i put into my fitness pal for exercise? in other words, after i put in my burn of calories for cycling, i see 1300 calories for fitbit calorie adjustment. is this 1300 plus my 700 i burned cycling, or does this 1300 INCLUDE the 700 i just burned and therefore i am getting credit twice for my cycling calorie burn?? anyone kno
  1614129
October 11, 2012 10:25 AM
This fitbit adjustment is VERY confusing. If I'm understanding correctly there is some "projection" done in the calculation. I have looked back over the past week. On those days, there were times when it said I had earned 500 extra calories from exercise. I didn't make a record of that at the time. But it has said that most days. So I thought I was doing great! Thankfully, I always leave calories on the table. Weighed in yesterday and I hadn't lost much. Like .20 lbs. Better down than up of course. But, based on what I had been seeing day to day, I was expecting more. So I look back and now there is not one day that says I earned even close to 500 calories. Not one day. On many days it has said this. So, I'm wondering how useful this is going to be. If I can't rely on what it's showing me at the time I'm looking at it.... I have serious questions on how much use it is to me. Disappointed. :(
October 12, 2012 8:09 AM
Hello,

I feel like the fitbit adjustment way too high, which would lead to me overeating.

Here are my numbers from yesterday. Maybe I am missing something?

from MFP:
Calories Burned From Normal Daily Activity 2,490 calories/day
exercise logged = 0
MFP projected calorie burn for the day = 2490

from fitbit:
3272 calories burned

now the math:
fitbit adjustment = 3272 - 2490 = 782

actual fitbit adjustment = 1072

So, to me, it appears that its about 300 calories over. Even if it used the 782 I feel like that's probably double what it should be.
Where am I going wrong? What am I missing?
October 12, 2012 8:13 AM
bump
  27100996
October 12, 2012 8:24 AM
Have just ordered a Fitbit....kind of wish I had found this thread BEFORE ordering.
Sounds like I could get verrry confused, verrrry quickly - gulp!
  25508416
October 12, 2012 9:59 AM
bump to read
  19861998
October 15, 2012 4:38 PM
I don't seem to be having an issue with the adjustment, mostly because I don't believe in eating calories I've burned because it defeats the purpose. The calories burned is just more of a bonus for me and I stick to staying under 1500 calories a day.
  11563525
October 15, 2012 4:44 PM
I just got mine a couple of weeks ago. I have no idea how it calculates my numbers.
  3895870
October 15, 2012 7:20 PM
My Fitbit calories burned is also to high, it is showing 1000 and should be around 300-400.
  27502627
October 16, 2012 12:55 AM
I am finding the negative FB adjustment after I have stopwatched an activity (or even just worn my FB for steps only and taken the calorie readings from cardio machines) to be quite irritating as it is pretty much (initially) negating all that effort.

At the moment it DOES readjust eventually... but I read in another thread that you guys are looking at negative values - which worries me... as the calculation algorithms don't seem to be settled ...

I log all my exercise on MFP and only use the FB for steps/some times activities when I want to get a more accurate count.
  26587270
October 16, 2012 5:44 AM
FitBit is now ADDING calories instead of subtracting calories on my count! I've tried disconnecting and connecting the accounts again, and it's still adding my workout calories. (Ex: I ate 45 calories, I "earned" -110 calories = Net 155 calories!)
  8896198
October 16, 2012 5:50 AM
I'm having this new problem too. I just logged in, haven't done much of anything today but get dressed and I see this:

" *You've earned -86 extra calories from exercise today "
October 16, 2012 6:02 AM
Dear Fitbit Users,

We just launched a wide range of new partner integrations, and with the launch came an upgrade to our handling of the Fitbit Calorie Adjustment.

Previously, it wasn't possible for us to adjust your calorie goal downward based on your daily activity. This meant MyFitnessPal users needed to "dial down" their profile's activity level in order to make elbow room for the Fitbit Calorie Adjustment to add calories to their Net Calorie Goal.

With today's upgrade, you don't have to worry about your settings at MyFitnessPal. If your projected activity level is lower than our estimated calorie goal at MyFitnessPal, we'll adjust your calorie goal downward with a negative adjustment. As you're more active over the course of the day, and your Fitbit syncs again, the adjustment will reflect your activity.

We believe this will give you a much more accurate sense of your daily activity and how your Fitbit's data is affecting your goals. Please let us know!

Steven
MyFitnessPal Staff
October 16, 2012 7:12 AM
QUOTE:
With today's upgrade, you don't have to worry about your settings at MyFitnessPal. If your projected activity level is lower than our estimated calorie goal at MyFitnessPal, we'll adjust your calorie goal downward with a negative adjustment. As you're more active over the course of the day, and your Fitbit syncs again, the adjustment will reflect your activity.

We believe this will give you a much more accurate sense of your daily activity and how your Fitbit's data is affecting your goals. Please let us know!

Steven
MyFitnessPal Staff


Sorry, but MFP saying I have used 190 calories (the "adjustment" listed -190 for exercise??!?) just from waking up this morning is not a "more accurate sense of your daily activity".

For the last few days, if I added in a specific cardio exercise, the Fitbit calorie adjustment would automatically deduct those calories and zero it out. I simply delete the calorie adjustment and guess I will just continue to do so.
Edited by grtamcnnvl On October 16, 2012 7:13 AM
October 16, 2012 8:03 AM
One thing to remember, if you are Walking, Running, Jogging for example. Do not log the exercise in MFP but log it on FitBit. Use the FitBit activity for activities that the FitBit is good at. Log on MFP activities such as Swimming, Lifting etc. This tip was taken directly from the MFP Help Site.

Another item is when FitBit & MFP end up with an adjustment, the calculation is base don how many calories you burned thru exercise and how many calories you would have burn during that time, without exercise.

For example: This morning I walked for an hour, according to my HRM I burned 510 calories, I logged this into the FitBit activities. When the adjustment came thru to MFP is was +357 calories. Which means based on my settings of Sedentary, MFP feels that I would have burned 153 calories w/no exercise.

So if you end up with a negative number, it is basically telling you, MFP feels you should be burning x amount and the FitBit is telling you, you haven't burned x amount. So get moving!

Just my thoughts, and justification regarding FitBit adjustments.

Also, if you are person that sits most of the day, you should see the Fitbit adjustment change thru the day, so my +357 calories, will dwindle down as the day goes by, since I sit at desk all day. This helps me gauge on how many calories I can eat. If I am a slug, it will show on my FitBit Adjustment. This gives me an incentive to make sure my number stays positive and keep moving.
Edited by alkencka On October 16, 2012 8:11 AM
  11972907
October 16, 2012 8:25 AM
I'm also not appreciating getting to work and it showing that it subtracted calories from my daily allowance. I realize that I don't have many steps for the day in since I was sleeping and was only awake for 20 minutes before I left the house, but not how I wanted to start my day =/

I HATE seeing my calories in the red - which they will be if I eat what I'm supposed to for the day, since I won't be home until very late tonight. Also, it brought my calories under my BMR - which shouldn't happen, right?
  2082773
October 16, 2012 9:15 AM
QUOTE:

QUOTE:
With today's upgrade, you don't have to worry about your settings at MyFitnessPal. If your projected activity level is lower than our estimated calorie goal at MyFitnessPal, we'll adjust your calorie goal downward with a negative adjustment. As you're more active over the course of the day, and your Fitbit syncs again, the adjustment will reflect your activity.

We believe this will give you a much more accurate sense of your daily activity and how your Fitbit's data is affecting your goals. Please let us know!

Steven
MyFitnessPal Staff


Sorry, but MFP saying I have used 190 calories (the "adjustment" listed -190 for exercise??!?) just from waking up this morning is not a "more accurate sense of your daily activity".

For the last few days, if I added in a specific cardio exercise, the Fitbit calorie adjustment would automatically deduct those calories and zero it out. I simply delete the calorie adjustment and guess I will just continue to do so.


What the negative adjustment is meant to communicate is not that you'd used 190 calories, but that based on Fitbit's sense of your activity level, your daily goal should be to eat 190 fewer calories than our MyFitnessPal estimate. We have only four levels of "activity" for you to set on MyFitnessPal, but the Fitbit is constantly updating your actual activity level. So based on Fitbit's best guess for the day, we update your net calorie goal by removing some calories from it. The adjustment will change over the course of the day. We're using the same calculations we've been using to compare Fitbit's suggested activity level with our MyFitnessPal estimate, except that now we don't stop the calculation at zero. This should mean that your calorie goal at MyFitnessPal is more accurate over the course of the day, because days with low activity will register as days you should eat less, whereas previously days with low activity might result in a "zero" adjustment, which wasn't really communicating that your calorie goal on MyFitnessPal was actually too high.

Does that help?

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