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Movements of the Knee Joint

Extension:

Definition: Straightening the knee joint by moving the lower leg away from the hamstring.
Image:
Muscles
Involved:
Exercises:

Flexion:

Definition: Bending the knee joint by moving the lower leg toward the hamstring.
Image:
Muscles
Involved:
Exercises:
  • Leg curl
  • Glute-ham raise
  • Romanian deadlift (static knee flexion)

External Rotation (Lateral Rotation):

Definition: Rotating the lower leg and foot laterally (outward), with a bent knee joint.
Image:
Muscles
Involved:
Exercises:
  • Knee external rotation

Internal Rotation (Medial Rotation):

Definition: Rotating the lower leg and foot medially (inward), with a bent knee joint.
Image:
Muscles
Involved:
Exercises:
  • Knee internal rotation

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