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(G T @ Dec. 19 2008,3:32)</div><div id="QUOTEHEAD">QUOTE</div><div id="QUOTE">I've always wondered.
For example, if you've completed two weeks of SD, how much could you tolerate before you're conditioned again?
Would one maxout ruin a deconditioned state? Would too many sets of a light weight ruin it?</div>
One or two workouts here and there? NO.
Light weights aren't a problem either, BUT...
As long as you are progressing the load, you will be activating your muscles, breaking them down and entering a consistent mode of protein synthesis.
The problem is if right after SD, you entered into your heavy 5's and continued doing that. You wouldn't have much room to progress the load from there. Going lighter is not stimulating your muscles more. Those weights would keep your muscles conditioned, but it is not optimal for growth.
The repeated bout effect comes from lifting these weights for an extended period of time. You can only progress so much, and your muscles will no longer be stimulated, thus, time for SD.