Worn over the legs with a harness that reaches up the back and around the shoulders, X1 has 10 degrees of freedom, or joints -- four motorized joints at the hips and the knees, and six passive joints that allow for sidestepping, turning and pointing, and flexing a foot.
ENGADGET: NASA and IHMC building X1 exoskeleton to give us a lift, keep us fit in space and on Earth