Carb Cycling

I typically bulk for 5-10 weeks depending upon how I progress and then cut anywhere from 2-4 weeks.

The idea is that during bulking you increase your metabolic rate, leptin, T3, etc and so when you start cutting you are able to lose body fat much faster than normal. Anyone who has ever dieted for more than 4 weeks has experienced this effect.

The first few weeks you lose a lot of body fat quickly, but after that your body fat loss slow dramatically as your metabolic rate slows.

During cutting your body becomes more sensitive to insulin so that when you begin bulking again you are better able to tolerate carbohydrates and remain leaner. Therefore, by doing this you should be able to stay leaner while gaining muscle than you would if you just straight "bulked up" for say six months.