Twingy back

[TTT]

Every time I stretch backwards (i.e. arch my back, stick out my chest, etc.) I get some sort of pinched nerve or something that makes it painful to bring my back straight again. This goes away in a few minutes but it's pretty annoying. Anyone else experienced this? Could it be due to putting more muscle on my back? The pain is right up next to my spine, I guess alongside the left spinal erector, at about mid-back.

P.S. it doesn't hurt when I do deadlifts or squats or anything, because those involve bending the other way...

[ryuage]

so you say you round your back when you squat and deadlift?

[TTT]

Nope, just that it's more likely to go that way than backwards, if it bent at all. I only get the problem when I arch it pretty much as far as it will go.