Fig. 1From: Differences in the flexion and extension phases during kneeling investigated by kinematic and contact point analyses: a cross-sectional studyKneeling action and lateral fluoroscopic imaging. a Represents the starting posture when the subject is kneeling with a knee flexion angle of 90°. b Represents the posture when the subject flexes the knee to the maximum flexed angle from (a). X-rays are emitted from the radiation source (X) toward the flat panel (Y), and a series of actions are recordedBack to article page