Knee motion required for some basic activities

Activity	Approximate knee flexion required*
Walking without a limp on flat ground	75°
Stair climbing	90°
Cycling	90°
Jogging	105°
Running	120°
Sprinting	140°
Getting out of a car	135°
Getting in or out of a bathtub	135°

* The knee flexion measurement is determined from a starting position of full extension, which is 0°.

Adapted from: Rowe PJ, Myles CM, Walker C, Nutton R. Knee joint kinematics in gait and other functional activities measured using flexible electrogoniometry: how much knee motion is sufficient for normal daily life? Gait Posture 2000; 12:143.

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Knee motion required for some basic activities