Do this stretch for low back and shoulder pain. [video]
Low back tightness is common. Feeling some tightness in the low back is not uncommon. The reasons why the back can be tight are numerous. Most do not even involve the low back itself.
Other problems in the body (weakness, tightness and poor mechanics when moving) tend to manifest as low back pain. Sneaky sneaky.
Because of this, stretching the low back directly is often not the solution.