fiber
Carbohydrate Fats Protein
Carbohydrates are the main nutrient used for energy in the body. They are broken down into glucose, which the body's cells use as a primary source of fuel for various functions.
I would imagine protein.
energy pyramid or nutrient pyramid.
Yes, the lactic energy system is used for the fast short sprints.
Carbohydrates are the nutrient that is the easiest to be broken down and absorbed for energy use in the body. Carbohydrates are quickly converted into glucose, which is then used by the body for energy.
The word you're looking for is "watt." A watt is a unit of power that measures how fast electrical energy is used.
Sugars, fats and proteins can all be used to 'power' the body.
fat
fat
Proteins.