Motorized Prostheses for Lower-limb Amputees

Our inclusion criteria will be

* Above-knee amputation
* K2/K3/K4 ambulators
* At least 18 years old
* At least one year since amputation
* At least six months since the definitive prosthesis fitting
* Currently prescribed and using a mechanically passive or microprocessor-controlled prosthesis

Our exclusion criteria will be

* Over 350 lbs. body weight, the weight limit for our safety suspension systems
* Cognitive deficits or visual impairment that could impair their ability to give informed consent or to follow simple instructions during the experiments
* Pregnant women due to elevated safety concerns for this population
* Co-morbidity that limits their ability to participate in the study protocol (e.g., stroke, pacemaker placement that would interfere with the powered prosthesis, severe ischemia, cardiac disease, etc.)
* Adults who are unable to consent
* Individuals who are not yet adults (infants, children, teenagers)
* Individuals who use a wheelchair for mobility both outdoors and indoors because they may not be able to perform the necessary activities with their passive prosthesis or the powered prosthesis
* Prisoners, due to concerns with informed consent