Does muscle weigh more than fat?

Hi All!

ive been doing circuit training for past few weeks and recently weighed myself to see i have lost 6lbs in 3 weeks! YAY!
but im sure you have all heard this question. does muscle weigh more than fat because my biceps have gone slightly bigger and generally strength has increased.

So my question is do you think i have lost more fat than the scales tell me i have?

Replies

  • angieleighbyrd
    angieleighbyrd Posts: 989 Member
    No. It weighs the same, but it takes up less space. So if you lose a pound of fat, but gain a pound of muscle you will still weigh the same amount, but you'll be smaller.
  • katevarner
    katevarner Posts: 884 Member
    The only way to know if you are losing fat and/or gaining muscle is to get your body fat measured. It's possible that you just lost some of the fat that was covering your bicep underneath.
  • want2belean
    want2belean Posts: 124 Member
    Too funny..Had this conversation yesterday with a friend.. He said think about it "does a lb of feathers weigh more than a lb of bricks" NO silly...a lb is a lb...Right...I felt like such a *kitten*...I always heard muscle weighs more and never thought of it beyond that...
  • Dexy_
    Dexy_ Posts: 593 Member
    Does a kg of feathers weight more than a kg of stones? NO!

    Ffs it's simple stuff!

    But yes, muscle takes up LESS SPACE than fat.

    Nothing "weighs more" than anything else. The amounts/density varies.
  • david_swinstead
    david_swinstead Posts: 271 Member
    Using the "lb of feathers" logic would take us to the only logical conclusion that nothing weighs any more or less than anything else, as 1lb of anything always weighs 1lb.

    Clearly this logic is flawed.

    When we talk about weight, we refer to weight by volume. By volume muscle weighs a lot more than fat.
  • kat65
    kat65 Posts: 124 Member
    I get confused by this all the time. So technically, if you are getting smaller, but not losing weight, you are just replacing fat with muscle then, right?
  • Jamie_Lauren
    Jamie_Lauren Posts: 211 Member
    <img src="http://i.imgur.com/10hRh.jpg”>

    The difference between 5lb of fat and 5lb of muscle
  • Jamie_Lauren
    Jamie_Lauren Posts: 211 Member
    Picture didn't work....awks! :ohwell:
  • david_swinstead
    david_swinstead Posts: 271 Member
    10hRh.jpg

    The difference between 5lb of fat and 5lb of muscle

    Fixed it for you.

    As if its not obvious, I guess its worth pointing out that the fat is on the left.
  • Fatboy2Fitboy
    Fatboy2Fitboy Posts: 44 Member
    thanks for the pic! and also yeah that is what i meant by the volume of the mass cz yeah 1 lbs of fat weighs the same as 1 lbs of muscle.

    good stuff! thanks everyone!
  • chrishgt4
    chrishgt4 Posts: 1,222 Member
    It's possible - as you've just started your body will be more prone to muscular hypertrophy. Also they will be filing themselves with water in which to repair themselves.

    However - whilst yes, muscle does weigh more than fat (God help anyone that tries to disagree with me about that statement), it is only by quite a small fraction, like 20%ish.

    Either way - it sounds like you're on the right track so keep it up!
  • Jamie_Lauren
    Jamie_Lauren Posts: 211 Member
    10hRh.jpg

    The difference between 5lb of fat and 5lb of muscle

    Fixed it for you.

    As if its not obvious, I guess its worth pointing out that the fat is on the left.

    LOL Thank you :drinker:
  • Jamie_Lauren
    Jamie_Lauren Posts: 211 Member
    It's possible - as you've just started your body will be more prone to muscular hypertrophy. Also they will be filing themselves with water in which to repair themselves.

    However - whilst yes, muscle does weigh more than fat (God help anyone that tries to disagree with me about that statement), it is only by quite a small fraction, like 20%ish.

    Either way - it sounds like you're on the right track so keep it up!

    Does 1 lb of lead weigh more than 1 lb of feathers?

    It does not "weigh" more, but it is denser.
  • want2belean
    want2belean Posts: 124 Member
    [Good pic- To show the difference of volume..Thanks]
    10hRh.jpg

    The difference between 5lb of fat and 5lb of muscle

    Fixed it for you.

    As if its not obvious, I guess its worth pointing out that the fat is on the left.
    [/quote]
  • dawson55510
    dawson55510 Posts: 197 Member
    [Good pic- To show the difference of volume..Thanks]
    10hRh.jpg

    The difference between 5lb of fat and 5lb of muscle

    Fixed it for you.

    As if its not obvious, I guess its worth pointing out that the fat is on the left.
    [/quote]

    nice pic
  • chrishgt4
    chrishgt4 Posts: 1,222 Member
    It's possible - as you've just started your body will be more prone to muscular hypertrophy. Also they will be filing themselves with water in which to repair themselves.

    However - whilst yes, muscle does weigh more than fat (God help anyone that tries to disagree with me about that statement), it is only by quite a small fraction, like 20%ish.

    Either way - it sounds like you're on the right track so keep it up!

    Does 1 lb of lead weigh more than 1 lb of feathers?

    It does not "weigh" more, but it is denser.

    Who mentioned 1lb of anything vs 1lb of anything else?

    it is denser, and therefore weighs more when in equal volumes.
  • PayneAS
    PayneAS Posts: 669 Member
    18429001_8072.jpg

    Which do you think looks better under your skin?
  • mulderpf
    mulderpf Posts: 209 Member
    10hRh.jpg

    The difference between 5lb of fat and 5lb of muscle

    Fixed it for you.

    As if its not obvious, I guess its worth pointing out that the fat is on the left.

    I shouldn't browse these forums while eating my lunch....:sick:
  • Marc713
    Marc713 Posts: 328 Member

    Who mentioned 1lb of anything vs 1lb of anything else?

    it is denser, and therefore weighs more when in equal volumes.

    Exactly. Anyone that says it doesn't weigh more is just being snarky.
  • KyleB65
    KyleB65 Posts: 1,196 Member
    1lb of muscle weighs exactly the same as 1lb of fat!!

    However, muscle is something like 5x as dense as fat. So the volume of 1lb of muscle would be 5x smaller than that of 1lb of fat.

    So, do not stress the fact that weight/strength training will add lbs! I can say from personal experience that you can gain a little weight while at the same time tone your body. - Smaller waist - more defined abs, arms, back & legs.

    I have also read that lean muscle mass burns more calories at rest than fat.
  • Jamie_Lauren
    Jamie_Lauren Posts: 211 Member

    Who mentioned 1lb of anything vs 1lb of anything else?

    it is denser, and therefore weighs more when in equal volumes.

    Exactly. Anyone that says it doesn't weigh more is just being snarky.

    Wouldn't that technically mean that it has a higher density than fat? :wink:

    (and I'm not being snarky, just a smart *kitten* lol...)
  • chrishgt4
    chrishgt4 Posts: 1,222 Member

    Who mentioned 1lb of anything vs 1lb of anything else?

    it is denser, and therefore weighs more when in equal volumes.

    Exactly. Anyone that says it doesn't weigh more is just being snarky.

    Wouldn't that technically mean that it has a higher density than fat? :wink:

    (and I'm not being snarky, just a smart *kitten* lol...)

    Absolutely it has higher density.

    The original quote was that muscle weighs more than fat though. They never specified how much of each and by what measurement, be it weight/volume or anything else.

    You assumed they were talking about equal amount of grams, I assumed they were talking about equal amount of volume.

    I used my common sense to discern that it would be ridiculous for someone to try to assert that 2 equal weights are in fact different weights, and so logically assumed they were talking about a comparison by volume.

    Not such a smart *kitten* now, eh? ;)
  • m60kaf
    m60kaf Posts: 421 Member
    OMG this old crap - I love MFP.. I recently posted a serious nutrition question , no one, not a single person. Then on a post like this all the pedantic smart arses come out and it goes on for pages. Oh I feel so so so sorry for what gives some people a sense of achievement

    If you can't accept the implied volume concept here - carry on eating wrong and wonder at the mystery of obesity - it's someone elses fault

    Incidentally that picture is wrong comparing fat to muscle . muscle is about 80% volume of fat and I would guess there is what ?? 200-300g of meat pictured
  • jimmmer
    jimmmer Posts: 3,515 Member
    Muscle weighs more than fat by volume if they are both in an equally strong gravitational field.

    Thread closed.
  • AlsDonkBoxSquat
    AlsDonkBoxSquat Posts: 6,128 Member
    ffs. Muscle weighs more than fat by volume. I pound of feathers equals a pound of concrete, but one takes up more space than the other. So . . . a gallon of fat weighs less than a gallon of muscle.
  • AlsDonkBoxSquat
    AlsDonkBoxSquat Posts: 6,128 Member
    Also, strength can increase without technically building lean mass, just saying.
  • Jamie_Lauren
    Jamie_Lauren Posts: 211 Member

    Absolutely it has higher density.

    The original quote was that muscle weighs more than fat though. They never specified how much of each and by what measurement, be it weight/volume or anything else.

    You assumed they were talking about equal amount of grams, I assumed they were talking about equal amount of volume.

    I used my common sense to discern that it would be ridiculous for someone to try to assert that 2 equal weights are in fact different weights, and so logically assumed they were talking about a comparison by volume.

    Not such a smart *kitten* now, eh? ;)

    Touche! :laugh: :flowerforyou: