Where does the fat go?

[BDF]

Surely the equation is just this simple:

 

Body uses energy (measured in KJ or Calories) to live

Food becomes energy (KJ/Calories)

Energy is either used or stored (as fat)

 

If FOOD IN > ENERGY USED then WEIGHT INCREASES

conversely

If FOOD IN < ENERGY USED then WEIGHT DECREASES

 

Therefore, to lose weight, eat less or exercise more or both.

[GaryvdM]

Surely the equation is just this simple:

 

Body uses energy (measured in KJ or Calories) to live

Food becomes energy (KJ/Calories)

Energy is either used or stored (as fat)

 

If FOOD IN > ENERGY USED then WEIGHT INCREASES

conversely

If FOOD IN < ENERGY USED then WEIGHT DECREASES

 

Therefore, to lose weight, eat less or exercise more or both.

 

Nobody is questioning that. The question is when you exercise, in what form does the mass leave the body?

[blondeonabike]

While we are talking about organic chemistry in the body.....I remember holding my newborn baby and realising that very part of her body was once something I had eaten in the last nine months. So basically fanta orange and mint chocolate. 

[BDF]

Nobody is questioning that. The question is when you exercise, in what form does the mass leave the body?

I know. I was just throwing in my lot on the theme of the comments made by Saag, NRS182, Snytjie and Flymango made concerning how to burn the fat...

 

I think the discussion is an interesting one in terms of where it goes! The body had a limited number of mechanisms for expelling waste bye-products and spent energy sources - Sweat glands, lungs, urine and need I add, anus. I find the revelations on how much "fat" being expelled via the lungs quite interesting.

[blondeonabike]

I thought it was heat.

Only matter has mass.  Heat is a form of energy.  Energy can be "stored" within matter, by endothermic chemical reactions that require energy.  ( So if you eat too much the body will store the extra energy as fat.  Fat is a  large molecule that requires much energy to create.) When energy is needed at a later stage the large fat molecule is broken up and energy is released.

[Rider3000]

That's the tears of your fat crying ....

Urbanroyal... keep on posting! 

[marcfr]

I thought it was heat.

I thought only nuclear fusion results in mass being converted to energy/heat. If we converted 10kgs of mass/fat to energy according to E=MC^2 I think we'd all be cycling a lot faster Does the heat we generate when cycling not come from exothermic chemical reactions which only results in mass being converted from one form to another and is not actually "lost".

[GaryvdM]

I thought it was heat.

 

You do lose mass when you give off heat due to the mass-energy equivalence (E=mc²), but it is such a tiny tiny tiny amount.

 

e.g. if you ride at 200 watts for an hour:

 

E = 0.2kwh

convert to Joules:

E = 720000j

 

plug it in to Einstein's famous formula:

m = E/c²

and we get

m = 8.01108e-12 kg

or

m = 8.01108 ng

[BDF]

You do lose mass when you give off heat due to the mass-energy equivalence (E=mc²), but it is such a tiny tiny tiny amount.

 

e.g. if you ride at 200 watts for an hour:

 

E = 0.2kwh

convert to Joules:

E = 720000j

 

plug it in to Einstein's famous formula:

m = E/c²

and we get

m = 8.01108e-12 kg

or

m = 8.01108 ng

Is that 8 nanograms?

['Dale]

You do lose mass when you give off heat due to the mass-energy equivalence (E=mc²), but it is such a tiny tiny tiny amount.

 

e.g. if you ride at 200 watts for an hour:

 

E = 0.2kwh

convert to Joules:

E = 720000j

 

plug it in to Einstein's famous formula:

m = E/c²

and we get

m = 8.01108e-12 kg

or

m = 8.01108 ng

That's deep, Gary'

[GaryvdM]

Is that 8 nanograms?

Yes.

[Greg29]

The fat cell is the right-hand guy in my avatar!

[Zatopek]

While we are talking about organic chemistry in the body.....I remember holding my newborn baby and realising that very part of her body was once something I had eaten in the last nine months. So basically fanta orange and mint chocolate. 

[Zatopek]

You do lose mass when you give off heat due to the mass-energy equivalence (E=mc²), but it is such a tiny tiny tiny amount.

 

e.g. if you ride at 200 watts for an hour:

 

E = 0.2kwh

convert to Joules:

E = 720000j

 

plug it in to Einstein's famous formula:

m = E/c²

and we get

m = 8.01108e-12 kg

or

m = 8.01108 ng

Suddenly that freeze-dry fat removal adds on Bok radio sounds very tempting