BMR/TDEE/MFP and FITBIT

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Replies

  • Holly_Roman_Empire
    Holly_Roman_Empire Posts: 4,440 Member
    I have been at it almost 60 days and just not seeing the results I had in the past. So I got to looking at the rest of the numbers.
    My net calories according to MFP is 1530
    My fitbit says I average about 1980 burned calories per day in the last month
    My TDEE is 1814
    and my BMR is 1630

    So with all of that hoping a numbers person can come in and tell me if I am where I should be or should I be eating more or less.
    I have been reading and will continue to read how TDEE and BMR fit into the equation but in the meantime figured I would ask.
    I often wonder if my fitbit is messing with things as well -- I LOVE the step counter but perhaps it is tweaking MFP incorrectly and I should not sync it and go back to letting MFP decide daily -- Although you would think the fitbit is a better gauge since it is on me and not just guesstimating. I think I have too many numbers and too much info :( I just need to know what numbers to believe so that I can be successful once again.

    Thanks for the help!

    If your Fitbit is saying that you're burning 1980 calories a day, what makes you say that your TDEE is 1814?

    Some site online


    There's the source of your confusion, then. What you see with online calculators is an estimated TDEE. What the Fitbit is giving you is your actual TDEE based on how much you, personally, move.

    I think this is the single greatest benefit of having a fitbit, if your primary form of exercise is walking, running, or stairs.
  • Holly_Roman_Empire
    Holly_Roman_Empire Posts: 4,440 Member
    I have been using a fitbit flex for the last 7 weeks & I find it to be very accurate. My BMR is about 1650, so I eat at this level each day. I then try to ensure I burn enough cals on my fitbit to ensure a 3500 cal deficit for the week. This allows me to loose at a rate of 1lb per week. Based on my stats since wearing it I have lost at a rate of 1lb per week as planned. Most of my exercise is walking/hiking and I don't eat back additional calories unless I have had quite a high additional burn - If I did a long hike on a weekend & burned an additional 600 calories to my usual day, then I might eat back half.

    Sometimes I do circuit training, but I log these separately & don't tend to eat back the cals. I don't like eating back cals from exercise which I am effectively having to guesstimate the calories burned. If I do this I run the risk of over estimating calories burned & then pver eating when I eat them back.

    I try not to get too bogged down with the figures in terms of TDEE etc. I would suggest you eat at BMR. After that it is a simple equation of cals in V cals out. You need to burn 3500 cals more than you consume each week to loose 1lb. So, as long as you weight & track your food accurately and watch how many cals you burn with the fit bit, the scales should start moving.

    I really struggled before I go my fitbit. Finally I feel I have a little more control.

    So you eat at your BMR and then don't eat the exercise calories you burn unless it's a hike? I'm sorry, but that's terrible advice.

    ETA: And what's the point of having a fitbit if you just eat your BMR?
  • EmoJew
    EmoJew Posts: 94 Member
    I have been using a fitbit flex for the last 7 weeks & I find it to be very accurate. My BMR is about 1650, so I eat at this level each day. I then try to ensure I burn enough cals on my fitbit to ensure a 3500 cal deficit for the week. This allows me to loose at a rate of 1lb per week. Based on my stats since wearing it I have lost at a rate of 1lb per week as planned. Most of my exercise is walking/hiking and I don't eat back additional calories unless I have had quite a high additional burn - If I did a long hike on a weekend & burned an additional 600 calories to my usual day, then I might eat back half.

    Sometimes I do circuit training, but I log these separately & don't tend to eat back the cals. I don't like eating back cals from exercise which I am effectively having to guesstimate the calories burned. If I do this I run the risk of over estimating calories burned & then pver eating when I eat them back.

    I try not to get too bogged down with the figures in terms of TDEE etc. I would suggest you eat at BMR. After that it is a simple equation of cals in V cals out. You need to burn 3500 cals more than you consume each week to loose 1lb. So, as long as you weight & track your food accurately and watch how many cals you burn with the fit bit, the scales should start moving.

    I really struggled before I go my fitbit. Finally I feel I have a little more control.

    So you eat at your BMR and then don't eat the exercise calories you burn unless it's a hike? I'm sorry, but that's terrible advice.

    ETA: And what's the point of having a fitbit if you just eat your BMR?


    QFT
  • jonnythan
    jonnythan Posts: 10,161 Member
    I have been at it almost 60 days and just not seeing the results I had in the past. So I got to looking at the rest of the numbers.
    My net calories according to MFP is 1530
    My fitbit says I average about 1980 burned calories per day in the last month
    My TDEE is 1814
    and my BMR is 1630

    So with all of that hoping a numbers person can come in and tell me if I am where I should be or should I be eating more or less.
    I have been reading and will continue to read how TDEE and BMR fit into the equation but in the meantime figured I would ask.
    I often wonder if my fitbit is messing with things as well -- I LOVE the step counter but perhaps it is tweaking MFP incorrectly and I should not sync it and go back to letting MFP decide daily -- Although you would think the fitbit is a better gauge since it is on me and not just guesstimating. I think I have too many numbers and too much info :( I just need to know what numbers to believe so that I can be successful once again.

    Thanks for the help!

    If your Fitbit is saying that you're burning 1980 calories a day, what makes you say that your TDEE is 1814?

    Some site online

    The entire point of the Fitbit is that it measures your daily activity. The number it gives you at the end of the day is your (according to Fitbit) TDEE.
  • slk_5555
    slk_5555 Posts: 177 Member
    I have been using a fitbit flex for the last 7 weeks & I find it to be very accurate. My BMR is about 1650, so I eat at this level each day. I then try to ensure I burn enough cals on my fitbit to ensure a 3500 cal deficit for the week. This allows me to loose at a rate of 1lb per week. Based on my stats since wearing it I have lost at a rate of 1lb per week as planned. Most of my exercise is walking/hiking and I don't eat back additional calories unless I have had quite a high additional burn - If I did a long hike on a weekend & burned an additional 600 calories to my usual day, then I might eat back half.

    Sometimes I do circuit training, but I log these separately & don't tend to eat back the cals. I don't like eating back cals from exercise which I am effectively having to guesstimate the calories burned. If I do this I run the risk of over estimating calories burned & then pver eating when I eat them back.

    I try not to get too bogged down with the figures in terms of TDEE etc. I would suggest you eat at BMR. After that it is a simple equation of cals in V cals out. You need to burn 3500 cals more than you consume each week to loose 1lb. So, as long as you weight & track your food accurately and watch how many cals you burn with the fit bit, the scales should start moving.

    I really struggled before I go my fitbit. Finally I feel I have a little more control.

    So you eat at your BMR and then don't eat the exercise calories you burn unless it's a hike? I'm sorry, but that's terrible advice.

    ETA: And what's the point of having a fitbit if you just eat your BMR?

    I just said that I do eat some 'exercise' cals back, but not all. Fitbit is not just logging my purposeful exercise - it is logging day to day activities. If I burn 2200 on my fitbit in the whole day, that doesn't mean I eat 2200 cals - If I did that I would have no deficit & no weight loss!!

    I have my fitbit because I was interested to know what I burn each day (I spend the majority of my day at my desk) - fit bit gives me an accurate guide to cals burned. It also motivates me to walk a little more when doing day to day tasks. I feel I have more control & better results by being able to track this.

    I don't see your point. What makes your advice any more valuable?
  • Holly_Roman_Empire
    Holly_Roman_Empire Posts: 4,440 Member
    I have been using a fitbit flex for the last 7 weeks & I find it to be very accurate. My BMR is about 1650, so I eat at this level each day. I then try to ensure I burn enough cals on my fitbit to ensure a 3500 cal deficit for the week. This allows me to loose at a rate of 1lb per week. Based on my stats since wearing it I have lost at a rate of 1lb per week as planned. Most of my exercise is walking/hiking and I don't eat back additional calories unless I have had quite a high additional burn - If I did a long hike on a weekend & burned an additional 600 calories to my usual day, then I might eat back half.

    Sometimes I do circuit training, but I log these separately & don't tend to eat back the cals. I don't like eating back cals from exercise which I am effectively having to guesstimate the calories burned. If I do this I run the risk of over estimating calories burned & then pver eating when I eat them back.

    I try not to get too bogged down with the figures in terms of TDEE etc. I would suggest you eat at BMR. After that it is a simple equation of cals in V cals out. You need to burn 3500 cals more than you consume each week to loose 1lb. So, as long as you weight & track your food accurately and watch how many cals you burn with the fit bit, the scales should start moving.

    I really struggled before I go my fitbit. Finally I feel I have a little more control.

    So you eat at your BMR and then don't eat the exercise calories you burn unless it's a hike? I'm sorry, but that's terrible advice.

    ETA: And what's the point of having a fitbit if you just eat your BMR?

    I just said that I do eat some 'exercise' cals back, but not all. Fitbit is not just logging my purposeful exercise - it is logging day to day activities. If I burn 2200 on my fitbit in the whole day, that doesn't mean I eat 2200 cals - If I did that I would have no deficit & no weight loss!!

    I have my fitbit because I was interested to know what I burn each day (I spend the majority of my day at my desk) - fit bit gives me an accurate guide to cals burned. It also motivates me to walk a little more when doing day to day tasks. I feel I have more control & better results by being able to track this.

    I don't see your point. What makes your advice any more valuable?

    You're eating your BMR, the level it takes to keep your organs functioning in a coma, and you're trying to increase your calorie deficit from that. Does that sound okay to you?

    I actually didn't give the OP advice, but I really don't think eating your BMR calories and exercising to increase that deficit is a good idea.
  • WarmDontBurn
    WarmDontBurn Posts: 1,253 Member
    If I am reading correctly I *think* she means she eat her BMR and then goes by her fitbit.

    My fitbit tells me I burn anywhere from 1800-2300 calories so if I am eating my BMR (1444 -1514) plus excessive (hike -- although personally I do not hike) then I would think it evens out no?

    I could be wrong but that is how I read it.
  • slk_5555
    slk_5555 Posts: 177 Member
    I set my MFP daily cal goal at my bmr - so yes this is the base I work from. On days were i don't do any 'exercise' beyond my normal daily movements, then I stick to that bmr figure. On days when I do exercise, fitbit is linked to MFP and will show me extra cals burned and offer them as extra cals to eat. If I'm hungry I eat them - usually I eat between 50-75% of those cals. If I'm not then I don't - I tend to listen to my body in this respect. I only have big calorie burns when I go hiking 1-2 times a week max (sometimes not at all). I think the other poster maybe thinks I am exercising daily, not eating those extra cals at all & therefore my net cals (total cals consumed-exercise cals) is below bmr on a daily basis? This is not the case.

    I'm not a professional, I'm just offering my personal experience. Everone has a different opinion of what works or what is 'right'. All this advice can make it hard to know what to do. Presently I'm eating healthy fresh food (I love cooking), I'm full, have loads of energy, I'm more active day to day and am loosing 1lb a week - it works for me. I'm sorry if I wasn't clear in earlier posts - OP you can pm me if you want.

    The fit bit has basically made the equation much simpler & now I am loosing consistently.
  • jonnythan
    jonnythan Posts: 10,161 Member
    I set my MFP daily cal goal at my bmr - so yes this is the base I work from. On days were i don't do any 'exercise' beyond my normal daily movements, then I stick to that bmr figure. On days when I do exercise, fitbit is linked to MFP and will show me extra cals burned and offer them as extra cals to eat. If I'm hungry I eat them - usually I eat between 50-75% of those cals. If I'm not then I don't - I tend to listen to my body in this respect. I only have big calorie burns when I go hiking 1-2 times a week max (sometimes not at all). I think the other poster maybe thinks I am exercising daily, not eating those extra cals at all & therefore my net cals (total cals consumed-exercise cals) is below bmr on a daily basis? This is not the case.

    I'm not a professional, I'm just offering my personal experience. Everone has a different opinion of what works or what is 'right'. All this advice can make it hard to know what to do. Presently I'm eating healthy fresh food (I love cooking), I'm full, have loads of energy, I'm more active day to day and am loosing 1lb a week - it works for me. I'm sorry if I wasn't clear in earlier posts - OP you can pm me if you want.

    The fit bit has basically made the equation much simpler & now I am loosing consistently.

    I think this is an entirely reasonable approach.

    For people not doing a ton of exercise, eating approximately BMR is a perfectly valid strategy. This generally works out to a deficit of around 250-450 calories a day (more the larger you are). I also think it's reasonable to eat back 50-75% of exercise calories, and also reasonable to eat a bit more if you're genuinely hungry.
  • WinoGelato
    WinoGelato Posts: 13,454 Member
    I agree OP, all the numbers can be confusing.

    I also agree with Jonny and others that told you that what your FitBit is telling you your average calories burned are, that is actually your TDEE, within a small margin of error. Much more accurate than some calculator online.

    I wouldn't worry about the BMR too much - it sounds like you are being reasonable about not eating a VLCD and so I don't think you are going to eat drastically below your BMR.

    If I were you I would take that average FitBit calories burned over a month (or longer if you have the data) and calculate a deficit from there. If you want to lose a pound/week, subtract 500 cal from that average daily burned and set that as your new goal in MFP. Sounds like you are already pretty close to that number.

    If you do considerably more exercise on a day to day basis, you will get an adjustment above that calorie level and I would eat those calories back. If you do non-step based exercise, I would enter those calories from your HRM into MFP and if that results in an adjustment, I would eat those back too. I wear my FitBit, even when I do non-step exercise, so that FitBit recognizes I'm doing something for that 30 minute period or whatever, and then when I put the activity into MFP it adjusts and FitBit adjusts and I don't believe they are double counting - they are adjusting accordingly.

    I would track your weight for the next few weeks or more and see if you get the desired results.

    For me personally, since I've had my FitBit I've had to tweak my settings and goals a couple of times to get things right, but I find the FitBit to be very accurate - I was losing 0.5lb/week as desired and have been maintaining for the last couple of months with no real issues.
  • EmoJew
    EmoJew Posts: 94 Member
    I agree OP, all the numbers can be confusing.

    I also agree with Jonny and others that told you that what your FitBit is telling you your average calories burned are, that is actually your TDEE, within a small margin of error. Much more accurate than some calculator online.

    I wouldn't worry about the BMR too much - it sounds like you are being reasonable about not eating a VLCD and so I don't think you are going to eat drastically below your BMR.

    If I were you I would take that average FitBit calories burned over a month (or longer if you have the data) and calculate a deficit from there. If you want to lose a pound/week, subtract 500 cal from that average daily burned and set that as your new goal in MFP. Sounds like you are already pretty close to that number.

    If you do considerably more exercise on a day to day basis, you will get an adjustment above that calorie level and I would eat those calories back. If you do non-step based exercise, I would enter those calories from your HRM into MFP and if that results in an adjustment, I would eat those back too. I wear my FitBit, even when I do non-step exercise, so that FitBit recognizes I'm doing something for that 30 minute period or whatever, and then when I put the activity into MFP it adjusts and FitBit adjusts and I don't believe they are double counting - they are adjusting accordingly.

    I would track your weight for the next few weeks or more and see if you get the desired results.

    For me personally, since I've had my FitBit I've had to tweak my settings and goals a couple of times to get things right, but I find the FitBit to be very accurate - I was losing 0.5lb/week as desired and have been maintaining for the last couple of months with no real issues.

    If you put your ex in mfp does it just shunt it over to fitbit? I always assumed it would double log, though i may very well be wrong! Good to know that.

    I also adjust mine here and there and it has been a godsend for actually making some progress
  • slk_5555
    slk_5555 Posts: 177 Member
    Additional exercise should be logged in MFP, it gives the option to log the time at which you start the exercise & how long the exercise lasted. If u put in the time, fitbit will then adjust that part of your day based on the extra data enter. It won't double count it. Basically the data you enter yourself overwrites what fitbit naturally logged at that time. It will also show the data you have entered under a little data entry under 'active minutes' on you fitbit dashboard.
  • WarmDontBurn
    WarmDontBurn Posts: 1,253 Member
    I usually start the timer on my fitbit the same time I start my HRM monitor and then log though MFP -- it adjusts that time frame. I think I read that somewhere to log exercise everything on MFP and just let fitbit do its thing.
  • Mav3rick54
    Mav3rick54 Posts: 180 Member
    Fittbit is inaccurate if worn on the wrist. If it's on your torso it works just fine.


    Sorry, I will have to disagree with this statement. I have a fitbit force, which is worn on the wrist, and have had it since it first came out in early Nov. 2013. I have found it to be extremely accurate and a big reason for the number below. Like any of the fitness gadgets, it is a tool that can be used to motivate a person to move more. It worked extremely well for me. Just wanted to post a different view point and my personal experience.
  • JennyKCarty
    JennyKCarty Posts: 457 Member
    I don't think anyone brought this up, but are you weighing your food on a food scale? It's very easy to underestimate otherwise.
  • WarmDontBurn
    WarmDontBurn Posts: 1,253 Member
    I don't think anyone brought this up, but are you weighing your food on a food scale? It's very easy to underestimate otherwise.

    Yup I use the Salter 1450 Digital Nutritional Scale for everything! Even if I make spaghetti or a casserole everything is weighed and accounted for.
  • changing4life
    changing4life Posts: 193 Member
    I agree OP, all the numbers can be confusing.

    I also agree with Jonny and others that told you that what your FitBit is telling you your average calories burned are, that is actually your TDEE, within a small margin of error. Much more accurate than some calculator online.

    I wouldn't worry about the BMR too much - it sounds like you are being reasonable about not eating a VLCD and so I don't think you are going to eat drastically below your BMR.

    If I were you I would take that average FitBit calories burned over a month (or longer if you have the data) and calculate a deficit from there. If you want to lose a pound/week, subtract 500 cal from that average daily burned and set that as your new goal in MFP. Sounds like you are already pretty close to that number.

    If you do considerably more exercise on a day to day basis, you will get an adjustment above that calorie level and I would eat those calories back. If you do non-step based exercise, I would enter those calories from your HRM into MFP and if that results in an adjustment, I would eat those back too. I wear my FitBit, even when I do non-step exercise, so that FitBit recognizes I'm doing something for that 30 minute period or whatever, and then when I put the activity into MFP it adjusts and FitBit adjusts and I don't believe they are double counting - they are adjusting accordingly.

    I would track your weight for the next few weeks or more and see if you get the desired results.

    For me personally, since I've had my FitBit I've had to tweak my settings and goals a couple of times to get things right, but I find the FitBit to be very accurate - I was losing 0.5lb/week as desired and have been maintaining for the last couple of months with no real issues.

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  • TeaBea
    TeaBea Posts: 14,517 Member
    From of the good sources I've read, the advice is to make sure you always are eating at least above your BMR. So for you, that would be at LEAST 1630 TOTAL calories per day. Maybe keeping this in mind would be a help.

    Can you post the article because I cannot find the reason why body need to eat up to BMR?

    Do you want to lose fat + muscle ....or mostly fat?

    When someone is maintaining large deficits it's hard for your body to support lean muscle (too). Your BMR is heart, lungs, kidneys, etc.....the basics. Your heart will get the calories if your body has to choose between the 2.

    Morbidly obese people (for some reason) can lose "just" fat.....but the closer you are to goal....the less true this is.
  • benebabe
    benebabe Posts: 13
    I feel your pain. All of the numbers can be so confusing! I have been on a serious plateau recently and I had to up my daily calories to break it. Who knows? I may have to lower my calories again in a couple of weeks. Whatever works for you! I am also thinking of getting a fitness tracker to help me with my goals :)