Posture problems are common, regardless of whether you're sitting at a desk or are on your feet all day. This sequence is short, but don't let its size fool you - it is very effective. The poses target the hamstrings, which will help the low back, and the chest, which will help the upper back. Breathe 3-7 full, deep breaths in each pose, and see how you feel.
Please let me know if you've got a yoga sequence request!
PS- A more detailed post about posture.