A strap-on skeleton of composite braces, powered by dc motors at joints, and fitted with an array of sensors helps people who could not ordinarily stand and walk do so on their own. ReWalk, the semi-robotic suit from Argo Medical Technologies, Israel, (argomedtec.com), fits the body snugly to detect upper body movements, which it uses to initiate and help people walk. Wearers also use crutches for stability.

The device is undergoing clinical trials in Israel with pilots planned for rehab centers in Holland and Italy. A U.S. trial is scheduled to begin in November at the Moss Rehabilitation Center in Philadelphia, after which developer Argo will apply for FDA regulatory approval. Maintaining users upright on a daily basis and exercising even paralyzed limbs, says Argo, alleviates many health-related problems associated with long-term wheelchair use, such as osteoporosis and pressure sores. There are prerequisites. Users should be able to use their hands and shoulders (walk with crutches) and have a healthy cardiovascular system and bone density.