Many people with a leg amputation have difficulty walking even after they have finished their rehabilitation. The purpose of this study is to see if a large amount of walking practice on a treadmill can improve functional abilities.

Inclusion Criteria:

• Leg amputation that is either below the knee, through the knee, or above the knee
• Ability to walk with prosthetic
• Comfortably fitted with a prosthesis for at least 6 months
• Not currently receiving physical therapy for gait training
• Able to tolerate a moderate intensity exercise program

Exclusion Criteria:

• People with severe cardiac or pulmonary disease that limits ability to exercise.
• People with too much discomfort and/or pain that restricts their ability to walk.
• People with active wounds on their residual limb or contralateral foot.
• People who weigh more than 360lbs or are taller than 6'11" as the unweighing system can not support any greater load or height.