Whole-body Vibration Without Visual Feedback on Postural Steadiness in Unilateral Trans-femoral Traumatic Amputees

Inclusion Criteria: * 40 to 55 years of age. * Residual femoral length from ischial tuberosity to the end of the limb with distal soft tissue compressed (15-35 cm) * Unilateral trans-femoral traumatic amputation with single-axis mechanical knees, axial foot (single axis). * Able to walk without the use of any assistive device; subjects must have obtained a score of \> 5 for Houghton Scale to indicate active use of prosthesis and \> 41 for Berg Balance Scale (BBS). * Medicare level 3 (community) ambulatory or above. * Ability to descend stairs and hills without caregiver and assistive devices. * Be able to independently provide informed consent. * Be willing to comply with study procedures. Exclusion Criteria: * Reduced somatosensory sensibility of the non-affected limb, ulceration or pain at the stump * the amputation was of vascular origin * Poor fittings of prosthesis * Visual or vestibular impairment (vertigo or dizziness) * Lower limb musculoskeletal injury and other neurological deficits