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Can you please tell me about the active range of motion and passive range of motion tests for a torn acl?

1 doctor weighed in
Dr. Stacey Jaff
Physical & Rehabilitation Medicine

In brief: Exam for ACL-"ROM"

Passive motion is movement caused by some outside force.
Active motion is movement you generate yourself. These are not specific tests for an acl tear. The acl provides stability to a knee, so if there is a significant tear, there will be too much motion of one leg bone sliding over the other bone. This is "translation" of the femur on the tibia vs flexion (bending) or extension (straightening).

In brief: Exam for ACL-"ROM"

Passive motion is movement caused by some outside force.
Active motion is movement you generate yourself. These are not specific tests for an acl tear. The acl provides stability to a knee, so if there is a significant tear, there will be too much motion of one leg bone sliding over the other bone. This is "translation" of the femur on the tibia vs flexion (bending) or extension (straightening).
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