Relieve pain in your lower back with a simple stretching

For all those long time PC users, if you have developed lower back uneasiness, there is a very very effective stretching that you can do. Trust me, it works magically well.
Sit on the floor with your legs straight and apart forming a V-shape. Lean forward and move your torso from left to right over your legs keeping the hands forward. Do the reverse too.
It produces instant effect. No need to wait for months or so.