What is the normal range of knee flexion?

What is the normal range of knee flexion?

• A. 0-120°
• B. 0-100°
• C. 0-140°
• D. 0-90°

Answer: (C)

Knee flexion ROM is the arc from a straight leg (0 degrees) to how far you can bend the knee. In a healthy adult, that bend typically reaches about 140 degrees, though many people sit around 135–140 degrees. This maximum flexion allows common activities like stairs, squatting, and kneeling. So the normal range is from 0 to roughly 140 degrees. The other ranges are more limited than what is usually achievable in a healthy individual, which is why they aren’t considered the standard normal.

Knee flexion ROM is the arc from a straight leg (0 degrees) to how far you can bend the knee. In a healthy adult, that bend typically reaches about 140 degrees, though many people sit around 135–140 degrees. This maximum flexion allows common activities like stairs, squatting, and kneeling. So the normal range is from 0 to roughly 140 degrees. The other ranges are more limited than what is usually achievable in a healthy individual, which is why they aren’t considered the standard normal.