🦵 VMO vs VML: Activation & Function Summary

🔹 VMO (Vastus Medialis Oblique):

• Fiber type: Predominantly fast-twitch

• Activation:

  • Most active in the last 15° of knee extension

  • Preferentially recruited during closed-chain and concentric movements

  • Activated through adduction due to its connection to the adductor magnus

• Function: Pulls the patella medially to stabilize during terminal extension

🔹 VML (Vastus Medialis Longus):

• Fiber type: Predominantly slow-twitch

• Activation:

  • Most active between 70–90° of knee flexion

  • Recruited more during eccentric contractions

  • Pulls the patella medially and upwards

• Function: Provides deep, postural control of the patella through a wider range of flexion

🔹 Training Considerations:

• Longer more extended position target lower regions of the muscle

• Shorted more fixed activate higher regions of the muscle

• Compound movements go through both