This is the energy source the body looks for, and it is what it burns when a person starts exercising. The body transforms carbohydrates into glucose and transports it to the cells for energy.
Carbohydrates also replenish spent muscle-glycogen stores.
If your body is not well stocked, your workout could suffer. To get the most out of this energy source, choose complex carbohydrates like dried beans and peas, whole grain foods, and cereals like oatmeal. The duration and intensity of a workout will dictate carbohydrate needs. Most recreational athletes need 50 to 55 percent of calories from carbohydrates, which is the same as the recommended daily intake for non-athletes. Elite athletes, however, will require more.