Biceps Femoris


Human Movement Science & Functional Anatomy of the:

Biceps Femoris (Lateral Hamstring)

by Brent Brookbush MS, PES, CES, CSCS, ACSM H/FS

Biceps Femoris by Gray’s Anatomy – 20th Edition via

Biceps Femoris

  • Origin:
    • Long Head: Distal part of the sacrotuberous ligament and posterior part of the tuberosity of the ischium.
    • Short Head: Lateral lip of the linea aspera, proximal 2/3 of the supracondylar line, and lateral intermuscular septum.
  • Insertion: The long head and short head of the biceps femoris share a common tendon that inserts on the lateral side of the head of the fibula, lateral condyle of the tibia, and deep fascia on the lateral side of the lower leg.
  • Nerve:
    • Long Head: Tibial nerve; a branch of the sciatic nerve via the sacral plexus, originating from nerve roots S1, S2, and sometimes L5 or S3
    • Short Head: Fibular nerve (peroneal nerve); a branch of the sciatic nerve via the sacral plexus, originating from nerve roots L5 – S2
  • Action:
    • Long Head:
      • Hip: Extension and some lateral rotation
      • Knee: Flexor and tibial external rotator
      • Pelvis: Posterior tilt
      • Sacrum: Counter nutation (extension) via the sacrotuberous ligament in conjunction with a posterior tilt.
    • Short Head:
      • Knee: Flexion and tibial external rotation.
      • Hip: Although the short head of


Biceps Femoris — 42 Comments

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  2. Any advice in activating the glutes and external rotators while keeping the hamstrings off? Not sure if prone hip extension with knee flexed would do the trick or not?

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