Many of us suffer from occasional lower back pain. Matter of fact 80% of all adults will at some time experience it and many of us have chronic low back pain which affects our choices of activities every day.
One of the likely muscular causes of lower back stress is a shortened and tight Psoas Muscle. 
If your psoas is shortened it is constantly pulling on your lumbar vertebrae, hip, and thigh. As it tightens more each day, the lower back muscles compensate to stabilize the amount of tension on either side of your spine. This leads to excessive stress placed on the vertebrae and discs between the vertebrae.
One effective way to safely lengthen the psoas to reduce the stress on your spine is to practice the "Supported Corpse Stretch" every single day until you no longer feel any stretch or tension in either your lower back or the front of your hips & thighs.
Tune in to your body and practice these and the other techniques found in the Alexander Method of SMR to find lasting relief from back pains that have muscular origins.