The normal range for knee extension is up to how many degrees?

The normal range for knee extension is up to how many degrees?

• A. 0-2°
• B. 0-8°
• C. 0-0°
• D. 0-5°

Answer: (D)

Understanding knee extension range of motion: extension is the straightening from a bent knee toward full extension. In a normal knee, you align at 0 degrees with the leg straight, and many people can straighten slightly past that neutral position—about 0 to 5 degrees of hyperextension. That’s why the normal extension range is up to 5 degrees. Values smaller than that (0–2°) are tighter than typical, and a range like 0–0° would imply no allowance for any hyperextension, which isn’t considered normal for most adults. A range of 0–8° would exceed the commonly accepted normal.

Understanding knee extension range of motion: extension is the straightening from a bent knee toward full extension. In a normal knee, you align at 0 degrees with the leg straight, and many people can straighten slightly past that neutral position—about 0 to 5 degrees of hyperextension. That’s why the normal extension range is up to 5 degrees. Values smaller than that (0–2°) are tighter than typical, and a range like 0–0° would imply no allowance for any hyperextension, which isn’t considered normal for most adults. A range of 0–8° would exceed the commonly accepted normal.