Yes it truely does. We were not made to eat 3 large meals a day. If you think about it we were hunters and gatherers at one point and that is how our bodies are supposed to digest food. In small portions many times through out the day. Scientists have actually done studies were they put two groups of people on a certain food plan. Both got the same amount, same kinds and same calorie intake as each other. But one got 5-6 small meals a day the other ate 3 large meals a day. The group that ate the 3 large meals gained weight. The group that ate 5-6 small meals lost.
Here's the thing, you eat a meal, your body starts digesting it. Your blood sugar goes up, you insulin kicks in lowers the sugar to the acceptable range. Assuming that you ate a balanced meal your blood sugar will stay were it should without your body having to do too much for about 3 hours. Then it starts to drop, your mind has a hard time concentrating, you feel tired. If you stay this way for a long period of time your body will start breaking down you muscle, yes, your muscle gets broken down first and uses that to raise up your blood sugar. Then by the time you eat again, your famished so you eat, a lot. then you go through the same cycle. Now, once again assuming that you workout and use weights, all that hard earned muscle is getting used up between meals to keep you going. So, you're trying to raise your metabolism by building lean tissue, but your hurting your metabolism by starving your body in between meals.
Any extra calories that you eat a any meal will go to storage with in an hour or so of eating. We all know what I am saying by storage, fat.
So, yes it does help to eat every 3-4 hours, small meals. When I say small, I mean, oatmeal for breakfast with berries, a salad loaded up with colorful vegetables for meal 2, peanut butter w/ celery and an apple for meal 3, meal 4 a piece of chicken with brown rice and broccoli, meal 5 cottage cheese with fruit.
You can go by what I put there, or eat what you like. But that's the reason that eating 5-6 small meals a day is so much better for you. I would rather not get into digestion, that's a lot longer. LOL!
Kathy