This stretch requires a nice flat surface and start up on your hands and knees, drop your head down and lean back as far as your body will go, keeping your hands in their original position. If this stretch isn't enough for you, you can extend your arms out in front by creeping your hands forward. You should feel the main surface of your back and down your sides stretching. This is your latissimus dorsi which stretches all down you back, with the help of the smaller serratus anterior and the teres major muscles.
Repeating the stretch a few times throughout the day or maybe every morning when you wake up can really loosen your back and relieve the tightness that has built up and allow you to carry out the day easier.
Don't ever under estimate the importance of stretching and the benefits it holds.
The Kneeling reach forward stretch can help with lower back muscle strain and lower back ligament sprain.
Always remember that while stretching may be recommended to aid recovery out of injury, you should always be very careful when stretching through rehabilitation. Your soft tissues are likely to be more vulnerable to re-injury if you stretch too much or too hard during this time. Always check with your Health Care Professional who is guiding you through your recovery to make sure it is appropriate to start stretching, and please - ALWAYS FOLLOW THE RULES FOR SAFE STRETCHING (The first posting on this stretching blog).
Image taken from "Upper Body Stretches" wall chart by B. Walker.