Your body will adapt to the environment that you put it in. If you keep doing the same exercise over and over you will get good at it, and be stronger, but you are likely to be laking in another area. Frequency, intensity, time and type. Do different things, with different levels of difficulty and you should not need a "break." But as it has been said already, if you want to take a break or feel like you need one it will not set you back, you might even see huge gains after a week off.
Originally Posted by tommyho1
"Most men stop when they begin to tire. Good men go until they think they will collapse. But the VERY BEST men know that the mind tires before the body and push themselves beyond all limits. Only when all of these limits have been shattered can the unattainable be reached." ~Dan Gable