This exercise is to loosen the area between the lumbar spine and the sacrum, where is the bottom of the spine. Adhesion of this area often causes low back pain, sciatica and other leg problems like knee pain, ankle pain. So when there are any leg problems, I often insert a needle in this area to release pain in the thigh, knee, ankle or even the bottom of the feet. This exercise takes about 30 seconds. Once a day is enough. You can see the result right after the exercise by checking the tightness before the exercise. If your lumbar spine has too much inward curve, this exercise is very effective. Please watch the following video for this exercise.
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