The muscles related to the shallow chain path are divided into the shallow chain of the back: the erect muscle and the stretching muscle that support the body. Anterior superficial chain: flexor, knee extensor and ankle extensor. The shallow chain diameter of myofascial chain is a body chain composed of muscles and fascia, and it is a composite line composed of many muscles and fascia connected together. In the past research data, different scholars have made different classifications of myofascial chains, but their names are almost all: anterior shallow chain, anterior shallow chain, posterior shallow chain, lateral chain, rotating chain, or open chain, closed chain, oblique chain and so on.