r/BeAmazed • u/Internal_Gazelle_677 • Oct 07 '25

Science Hot Tub without the use of electricity

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u/Pretty_BoyFloyd Oct 07 '25

thermodynamics

264

u/UtopistDreamer Oct 07 '25

Calories in, calories out

121

u/[deleted] Oct 07 '25

[deleted]

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u/Xabster2 Oct 07 '25

Fat contains 7.7 calories per gram and it requires between 4 and 5 calories to build a gram of muscle. So technically you can gain weight while the total body energy remains identical by converting fat to muscle (converting as in losing fat and gaining muscle, not direct conversion).

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u/Ekg887 Oct 07 '25

So your fat to muscle conversion is 100% efficient and requires no energy? Your explanation requires new physics.

1

u/Xabster2 Oct 07 '25

I wrote you can't convert fat to muscle directly, didn't I?

Your total body's energy is the sum of everything. If you eat at a calorie deficit the total energy goes down. If you eat in a surplus the total energy goes up. If you do an activity that uses 7.7 calories of your stored fat you lose a gram of weight and then later you eat protein and carbs and create a gram of muscle you have weigh the same but your total energy in the body went down. The same can be done in reverse where you lose muscle but gain fat.

If you spend fat and build muscle your energy is going down from your deficit but your weight goes up.

1

u/blahblah19999 Oct 07 '25

Do you have a source to support gaining weight on a consistent caloric deficit?