What is the standard range of motion for the knee joint?

The standard range of motion for the knee joint is typically considered to be 0 to 135 degrees. This range includes full extension, which is 0 degrees, and flexion, which allows the knee to bend up to approximately 135 degrees. This flexibility is crucial for numerous activities such as walking, running, and squatting. Achieving this range of motion is essential for functional mobility and overall knee health.

In clinical practice, understanding the normal range of motion helps healthcare providers assess a patient's knee function effectively. Limitations in this range can indicate issues with ligaments, cartilage, or overall joint health, and guide rehabilitation or treatment strategies.