Figure 1 (A)A low-load, long-duration stretch to restore the patient's full passive knee extension. A 4.5-kg weight is used for 10-15 minutes with a bolster placed under the ankle to create a stretch. (B) Commercial device (Extensionater; ERMI, Inc, Atlanta, GA) to improve extension range of motion and prevent compensatory hip extemal rotation. (Color version of figure is available online.)