What's the deal with staying in shape in early adulthood?

It is very hard to stay in shape between ages 25 and 35. What do the people who stay in shape all have in common? They either diet right, exercise well or both. Exercise and dieting come down to one attribute in a person, discipline. Dieting right calls for you to have balanced eating habits; eating 2-3 meals a day depending how much you weigh, filled with all the proper nutrients. Complex grains for carbohydrates, meat, fish and chicken for protein and fat, fruits for sugar, vegetables for vitamins, water and more carbs, and dairy for more protein and calcium. Will dieting correctly mean you will be skinny? Not necessarily, but it will mean that you will have a healthy body. How skinny a person is or how much one weighs is directly correlated with how many calories one eats during the day. The more calories you eat the larger you will be and the smaller number of calories you eat the smaller you will be. If you would like to be healthy, eat a balanced diet. In terms of grains thi...