Quote:
Originally Posted by kaplods
Muscles DOES INDEED weigh more than fat - Most people understand that when people say muscle weighs more than fat, they mean per equal volumes. Thus muscle weighs more than fat, because a cubic foot of muscle most definitely, does indeed weigh more than a cubic foot of fat.
The reason why I "corrected' (or at least quibbled with) this claim is that 90% of the time when people say this is that it is used in this context:
Person A: "I am working out an hour a day for 6 days a week and yet I gained 3 lbs this week, what's wrong??"
Person B: "It's because muscle weighs more than fat. You are gaining muscle."
Persona A: "Oh okay, I guess it's okay then." or "Oh I guess I'm bulking up really fast. I should cut back on my exercise"
... when actually the gain is due to a) water retention and/or b) eating more due to increased exercise, whether for psychological, emotional, or physical reasons and/or c) moving less during the day because of exercise, either for psychological ("I worked out today, I don't need to take the stairs") or physical ("I am so tired from my workout.") reasons.
Muscle takes a LONG time to build. It takes a LOT of time to build 3 lbs (or even 1 lb) of muscle. Believing that weight gained is due to building muscles leads to the following misconceptions:
1. I don't need to work out as much because I build muscle quickly.
2. I should stop working out because the 3 lbs I gained is muscle and I don't want to bulk up.
3. The weigh I am gaining is good weight (muscle) so I'm not going to worry about it.
I corrected the statement "muscle weighs more than fat" because it was used in the context of "Don't worry about weight gain, it's because you are gaining muscle." I did not want the OP to
a) assume weight gain was for reasons other than water retention and stop working out/work out less (Misconception #1-2) or
b) actually be accidentally eating more than she should because the weight gain was due to inadvertent increase in calorie consumption (Misconception #3).
I almost always (unsolicited, of course) quibble with posts which claim that "Muscle weighs more than fat" for these reasons. I think it's really important not to fall into these three misconceptions. It often leads to a decrease in strength building exercises and can possibly lead to an inadvertent increase in caloric consumption per day, simply because the weight gain has been ascribed to the wrong reasons.
If this had been a post about someone who was 5'2, 145 lbs, extremely athletic (lifting heavily 3-4x/week with a trainer), but troubled because her BMI was higher than the normal range, it might be appropriate to remind her that because she is carrying more muscle per square inch on her body, and that muscle weighs more than fat, she will be heavier than someone carrying the same volume of fat, but that this does not imply she is overweight. (Sorry for the runon sentence.)
However, since in this case it implied "You are gaining weight after one week of exercise, that is because you are replacing fat with muscle, which weighs more," I felt it was in the OP's (and other readers') best interest to add further explanation to this implication.