Frequent balanced meals are essential for good health, energy and especially for training recovery and performance. The food you eat is needed for muscle repair which is an ongoing process. Also from a fat burning point of view, frequent meals will ensure that you keep your metabolism elevated as each meal gives it a boost as the body must go to work to digest and process it.
I compare the body to a fire - there is a constant need for refueling to keep it going. The fire burns the fuel for energy and so does your body. When you light a fire you load up and get it really firing up(breakfast). You then don't leave it die and then light again. As you see the flames beginning to lower you through in more fuel and continue to do this (frequent meals). The body does the same as the food that goes in is to be used as fuel.
Also important is that these meals are balanced i.e. you have protein, carbs and vitamins where possible. Also make sure the portion is right i.e. if you have a plate you should have 1/4 protein, 1/4 carbs and 1/2 veg and salad. Apply this portion guideline to all meals/snacks.
Always have protein and carbohydrates with each meal - all carbohydrates contain sugar and has varying degrees of effects on your blood sugar level depending on the type of carbohydrate e.g. banana v porridge By having a protein source in the meal you will slow the release of the carbohydrate and fiber will slow it further.
So for better results and sustained energy throughout the day make sure you have frequent balanced meals.