Knee
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Flexion
- Bending the joint resulting in a decrease of angle; moving
the lower leg toward the back of the thigh.
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Extension
- Straightening the joint resulting in an increase of angle;
moving the lower leg away from the back of the thigh.
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Medial Rotation (Internal Rotation)
- Rotary movement around the longitudinal axis of the bone
toward the center of the body; with the knee bent, turning the
lower leg inward.
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Lateral Rotation (External Rotation)
- Rotary movement around the longitudinal axis of the bone
away from the center of the body; with the knee bent, turning
the lower leg outward.
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Notes
- Mentioned articulations occur during concentric
phase of exercise video examples.
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