Figure 8.

The maximum estimated knee extension moment increased as the acceptable estimated hip moment increased (left). The dashed line marks the sit-to-stand transition threshold, which all subjects exceeded with minimal hip flexion moment. The maximum estimated hip flexion moment increased as the acceptable estimated knee moment increased (right). Hip flexion was estimated to occur with a negligible knee extension in three subjects. Hip flexion sufficient for gait was marked by the dashed line. Curves were constructed with single contact stimulation.