Benefit is to confuse the body and let the muscles replump a bit. I run my diet basically like this 50% proteins, 30% carbs and 20% fats. I space my carbs out by taking a serving of carbs in am with breakfast and then another serving 2 hours before the gym and another serving post workout (occasionally I will have simple carbs with protein during my workouts as this helps with recovery as well as sustains energy for those tough workouts). By splitting the carbs up like this and keeping your carbs somewhat low/restricted it allows your body to go into a nice state of lipolysis during the day when you are feeding your body with lean protein allowing you to feed the muscles the nutrients they need while also providing a source of energy (excess protein) to run the body which carbs (complex carbs which is really only kind I have for the most part, there are exceptions) take longer to process and digest.
That would be the simple answer. I will post a link to my thread about dieting to lose bf and help sustaining as much muscle during the process (original article was published by layne norton who is a pro natural bber and an education in the dieting world).
http://www.elitefitness.com/forum/showthread.php?t=821133
There we go.
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