Originally Posted by
Mark Rippetoe
I just got a new pair of Carhartt's, and I was reminded about a phenomenon I'd noticed years ago when I wore blue jeans: if the the things fit wrong, they can fuck up your low back in a very short period of time. If there is not enough material across the glutes, i.e. the dimension from glutes in the back to hip flexors in the front is too tight, and if the fabric doesn't stretch, the pants can pull your lumbar into flexion. You may not even notice it while you have them on. Depending on your back, this may be a bad problem. So look at the pattern of your back pain, and if you can associate it with a particular pair of pants, throw the goddamn things away. If you get new ones and they don't fit right, take them back. The problem with Carhartt's is that every pair fits a little differently, and I have 4 pair that fit perfectly.