Sure that on more than one occasion you've heard the expression "slow metabolism". But, does it make sense to speak of a slow metabolism? What factors influence? How can we increase?
To answer these questions let us see first what are the components in which is divided the daily energy expenditure of a person:
The human body uses two main energy sources, glucose and fat. The glucose is in the bloodstream and stored in the form of glycogen in the muscles and in the liver, and the fat in the adipose tissue and the fatty acids.
Metabolic flexibility is the body's ability to optimize the consumption of each energy substrate in function of the intensity of the physical exercise.
The theory of energy balance established from the first law of thermodynamics, that the energy that enters our body, the less that comes out is equal to what is stored in the form of fat.
This statement is true but does not explain the process of accumulation of the fat. The first law of thermodynamics is a universal truth, which is always met, but that has nothing to do with the metabolic processes of fat accumulation.