The term convection generally refers to the movement of fluids, meaning liquids and gases, but in the earth sciences, convection also can be used to describe processes that occur in the solid earth. This geologic convection, as it is known, drives the plate movement that is one of the key aspects of plate tectonics.
The recommended range is 45 â 65% of calories as carbohydrate. For example, if you eat 1600 calories per day, and 50% of those calories are carbohydrate, you would eat 200 grams per day. Athletes need to eat at the high end of the carbohydrate range, to fuel training and competition.
In the diet there are three worthwhile sources of calories: fat, protein and carbohydrates. There are many different ratios, and methods of determining those ratios, in use today. Following is just one of the many ways to figure the caloric ratio, but seems to work pretty well, with a good success rate.