I'm usually on a 6 to 8 week cycle (Power rack, GVT, general lifting, etc) through out a planned year. Will take off one or two weeks after each cycle ends. This will change if I get the chance to go to Mexico or the Islands, always time off for that. As FlexTons said, leaves one fresh and hungry to train again after a short break. Enthusiam is higher than ever. Not only does the body good but also the mental approach. Which, in a way, can be more important than the physical. Good Luck.