Knee Range of Motion Test

The normal knee range of motion typically ranges from 0 degrees (full extension) to about 135 degrees (full flexion). This range allows for adequate mobility required for most daily activities, including walking, running, and climbing stairs.

Three common special tests for the knee include the Lachman test, which assesses anterior cruciate ligament (ACL) integrity; the McMurray test, used to evaluate meniscal tears; and the valgus stress test, which examines the stability of the medial collateral ligament (MCL). These tests help identify specific knee injuries and guide treatment decisions.

A healthy individual should be able to bend their knee to approximately 135 degrees during flexion. This degree of motion is necessary for activities such as sitting down, squatting, and climbing stairs effectively.