在股后侧，臀沟下6寸，股二头肌与半腱肌之间。

注1：俯卧，膝关节抗阻力届曲时，半腱肌和股二头肌显露更明显；同时大腿作内旋和外旋时，半腱肌和股二头肌更易触摸到。

注2：于承扶(BL36)与委中(BL40)连线的中点上1寸处取穴。

On the posterior aspect of the thigh, between the biceps femoris and the semitendinosus muscles, 6 B-cun inferior to the gluteal fold.

Note 1: In the prone position, the semitendinosus and the biceps femoris muscles are more distinct when the knee is flexed against resistance. In addition, it is easier to find the two muscles with internal and external rotation of the hip.

Note 2: 1 B-cun superior to the midpoint of the line connecting BL36 with BL40.

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