This exercise is part of Ma Wang Dui Qi Gong. It is based on the Ma Wang Dui texts. The oldest surviving example of these texts dates back to 300 BC. However, the original book was most likely written quite a bit earlier. It’s important to note that many interpretations of the Ma Wang Dui forms have developed over the years. This is one interpretation that I particular like as it often focuses on specific acupuncture points.
This is exercise helps strengthen and stretch the Foot TaiYin acupuncture channel that runs from the big toe up to the lateral sides of the ribcage.