But pay attention because they contain very little protein. Pasta, for example, is the symbolic food for marathon runners, that give a 'pasta party' before each race. Sugar and chocolate are the most energetic carbohydrates because they can be immediately used by our body. But they are not balanced foods since the don't have any vitamins or protein. However, they are highly recommended for mountain climbers and in other sports in which low packaging is required.
Protein is also important because it's the basic food for cells, and so for a beings growth.
Products rich in protein are meat, poultry, fish, eggs, milk, cheese and some vegetables such as rice, potatoes, wheat or spinach. So, we can get protein either from animal or vegetable origin. The latter has strength while the former has speed. It's a misunderstanding to think that a diet must not contain fats. Indeed we need fats because not only are they a reservoir, but also they are responsible for the answering of our muscles and for our cells' lives.