would probably be enough to let your body rest and let the adaptation drop. When you come back, your strength will be up, but your endurance will be lower, so you will have to get back to that point of endurance and strength again. Also, changing up your routines once every 4-6 weeks is a great way to break the adaptation or just when you feel the need to do something different. Even changing hand positions or grips on some movements can spark some new growth.
Hope this helps, but yes, the body sometimes needs to get a little bit of extra rest. Just like we need a vacation from work, our bodies can handle a little vacation a couple of times a year too I suppose <img src="http://www.massmonsters.com/infopop/emoticons/icon_wink.gif" alt="Wink" width="15" height="15"><!--graemlin:
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*** It is easier to ponder the universe and its nuclear furnaces dancing their violent ballets across the heavens to the chaotic requiems played by quantum physics than it is to fathom the inner universe and complexities of the human body, mind, and spirit. *** Spook