Participants with lower limb loss will evaluate with the following assessment tools: Demographic datas; age, gender, height, body mass, year, side and level of limb loss will be recorded. Gait parameters (step length, variation of step length) will evaluate with Gait Trainer Biodex 2, at participant's preferred speed. To eliminate the learning effect, participants practiced at treadmill to determine appropriate gait speed. Once participants implied the preferred speed, they asked to walk at their self selected speed for 6 minutes. Data was recorded between the 2nd and 4th minutes at walk. Phantom sensation and phantom pain will be asked as existence or not. Sensorial loss will evaluate with Semmes Weinstein Monofilaments.