Watch the flexion extension back stretch video to improve your back flexibility and relieve tight core and lower back muscles.

How to do the Flexion Extension Back Stretch: Kneel on your hands and knees. Look up and let your back slump downwards. Then let your head fall forward and arch your back upwards. Perform this stretch slowly and deliberately, resting your weight evenly on both your knees and hands. Hold the back arch stretch position for a minimum of 20 seconds and then slowly move into back slump stretch position.

For more videos of back stretching exercises, visit... http://stretchcoach.com/articles/lower-back-stretches-video/