It has become common knowledge that low back pain occurs to a vast majority of the population. I see this a lot with clients who have jobs that involve prolonged sitting. No matter how amazing your posture is with sitting, the sedentary nature of working at the computer for extended periods causes undue compression and tightness.
There are several other overuse injuries that can occur with prolonged sitting, and low back pain is right at the top! Check out this video that shows some strategies for overcoming this nagging injury!