Originally Posted by Steven Low
If you're going really heavy you should take a week or two off (well, keep up your conditioning by doing some light work) or so after every 4-8 weeks.
I used to think I needed to stop for a week or two. The thing is I am only following a 3 day hybrid of SS and Oly lifting. So I am getting a solid 4 days of rest each week except sometimes I will do some sprint work. With that many rest days per week I don't think I am overtraining.