1 "food calorie" = 1kCal = 4.2kJ
4.2x10^3/(3x10^8)^2 = 4.7x10^-14kg
That is, a very tiny amount.
Obviously you don't lose weight by converting mass to energy. You convert chemicals that have useful chemical energy to those that have no accessible energy. Your body is then no longer interested in keeping them around and you excrete them.
The other answers are somewhat correct. E = mc^2 is about mass-energy _equivalence_, not mass-energy conversion. However it is true that if you expend energy your mass decreases, because mass and energy are equivalent.
4.2x10^3/(3x10^8)^2 = 4.7x10^-14kg
That is, a very tiny amount.
Obviously you don't lose weight by converting mass to energy. You convert chemicals that have useful chemical energy to those that have no accessible energy. Your body is then no longer interested in keeping them around and you excrete them.
The other answers are somewhat correct. E = mc^2 is about mass-energy _equivalence_, not mass-energy conversion. However it is true that if you expend energy your mass decreases, because mass and energy are equivalent.
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Exercising converts chemical energy into a usable form. That equation has to do with nuclear energy. So in order to use it you would have to look at the individual atomic interactions and when a chemical reaction happens the atoms get a small reduction of mass if they are giving of energy... I don't think it can be done.
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When you exercise, you convert chemical energy from carbohydrates and fats into mechanical energy and heat.
The equation E = mc2 indicates that energy always exhibits relativistic mass in whatever form the energy takes. Mass–energy equivalence does not imply that energy may be "converted" to matter, but it allows for matter to be converted to energy.
The equation E = mc2 indicates that energy always exhibits relativistic mass in whatever form the energy takes. Mass–energy equivalence does not imply that energy may be "converted" to matter, but it allows for matter to be converted to energy.