What is the normal knee extension ROM?

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Multiple Choice

What is the normal knee extension ROM?

Explanation:
In knee range of motion, extension is the straightening of the knee, and full extension is considered 0 degrees from a straight line. The standard reference value for normal knee extension is 0 degrees, meaning the leg can straighten completely with no bend. Some healthy people may have a tiny bit of hyperextension beyond neutral, but for normative data and most assessments, 0 degrees is used as the normal extension value. Values like 5, 10, or 15 degrees would indicate the knee cannot fully straighten and reflects a flexion deformity or limitation, not normal extension.

In knee range of motion, extension is the straightening of the knee, and full extension is considered 0 degrees from a straight line. The standard reference value for normal knee extension is 0 degrees, meaning the leg can straighten completely with no bend. Some healthy people may have a tiny bit of hyperextension beyond neutral, but for normative data and most assessments, 0 degrees is used as the normal extension value. Values like 5, 10, or 15 degrees would indicate the knee cannot fully straighten and reflects a flexion deformity or limitation, not normal extension.

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