Inclusion Criteria:  Admission Berg Balance Scale score of 21 or greater 18 years of age or older Be able to understand and respond to simple verbal instructions in any language Be able to physically tolerate and actively participate in at least three, 30 minute weekly sessions in the ZeroG body weight support system  Exclusion Criteria:  Cognitive deficits that would disrupt the ability to provide informed consent Admission Berg Balance Scale score less than 21 Uncontrolled hypotension Uncontrolled hypertension Unstable skin structure (i.e. skin grafts, chest tubes) Unstable rib or lower extremity fractures Osteoporosis Active enteric infection control precautions New limb amputations Need for greater than 50% high flow oxygen Body weight greater than 450 pounds (structural limitations of the ZeroG body weight support system)