About myself: Around 6'3" and 207lbs.. 25 years old and have been lifting "real" weights for around a year and a half at this point. Bill Star's 5x5 all the way. I've never had back problems in my life. Always great flexibility, never a stiff neck, rarely any kind a injury (and any I had were muscle related and healed quickly), and never anything major. The last months, or perhaps up to half a year or so, I've been getting stiff and sore in the lumbar region of my back. I've generally put it down to DOMS as a result of all the back work in my 5x5 routine, and if I remember correctly it used to disappear after a few days of rest. The last 3-4 weeks I've only lifted a few times as I have been hit by a few injuries (bit of a sprained knee, now very sprained ankle) and I've noticed that the stifness and soreness in my lower back isn't fading at all even though it's been more than 2 weeks since I've squatted anything heavy or deadlifted. This worries me quite a bit. My form has probably been suffering too much on the deadlift as I'm aware that I've had trouble keeping my lower back straight on the heavier lifts. This led to rounding of the back and a bit of a stretch in the region that is causing me problems now. The funny thing though is that I've always felt that squats were what most of all made me feel stiff and sore the day after, and while my squat is no where near perfect, I'm pretty sure my back is good and arched during the movement. Maybe it should be mentioned that this part of my back really is the only thing that has regularly been subject to any kind of discomfort after training. The rest of my body seems to heal very quickly and deals well with the workload. The problem is isolated to the lumbar region of my back and feels a bit like the sort of discomfort you might feel in a muscle group if you hit the weights far too hard after a longer break from lifting. I can move it, but it does feel stiffer and less mobile than I'm used to, and there is constantly a soreness there when I move that feels like I'm stretching muscles that have been misused. I guess it is obvious that I still think this feels like some sort of DOMS, but the more or less permanent nature of it seems to exclude that answer and tells me it might not be muscle pain(?) I'm sometimes tempted to ask somebody to just stand on my lower back while I'm lying on my stomach, as it somehow feels like that would help... It seems like I obviously need more strength in my lower back as it feels like it's a bottleneck in my lifting and thus prone to injury. I've been thinking about goodmornings, planks and high rep squats, but don't know if I'd just be making everything worse. I'm sure I'm suffering from a typical noobish condition here, so please tell me I haven't messed up something in my back that will take a long time to fix.