With the onset of prosthesis use following lower extremity amputations,body shows biomechanical changes according to the amputation level and consequently develops adaptation mechanisms both on the healthy and ampute side. Adaptations in the lumbo-pelvic and lower lumbar regions cause asymmetries in the muscle tissue by causing changes in the morphological structure of the muscle, especially in the muscles of the waist, hip and knee and recruitment.

The aim of this study is to investigate the effect of stairing up and down activity on the mechanical properties of lumbal paravertebral muscles in TFA and TTA and its relation with lower lumbar region pain.

Inclusion Criteria:

• to be TTA and TFA
• No complaints of chronic low back pain before amputation
• Using prosthesis for at least 6 months
• Being able to climb up and down stairs
• No history of falls that will cause injury or pain in the past 6 months
• Having good prosthesis comfort
• BMI<28.5
• Who can have cognitive functions to understand Arabic language

Exclusion Criteria:

• To be amputated due to congenital and tumor
• Who can not have cognitive functions to understand Arabic language
• Having orthopedic or neurological disorders that may cause chronic pain or functional impairment in the lumbar region
• Ankylosing spondolitis and rheumatoid arthritis patients

with unilateral transtibial/transfemoral amputation

Unilateral transfemoral and transtibial amputate patients