The purpose of the study is to examine the effect of a new biomechanical device and treatment methodology (AposTherapy) on gait patterns, pain, function and quality of life of patients with musculoskeletal and neurological disorders. Based on previous reports the investigators hypothesis that this therapy will have a positive effect on these measurements.

Inclusion Criteria:

• Primary osteoarthritis
• Lower limb joint replacement
• Lower limbs fractures
• Spinal disorders including LBP w/wo refered symptoms, radiculopathy, spinal stenosis
• ligaments tear
• Meniscal tears

Exclusion Criteria:

• lack of balance (3 falls in the last year)
• incapable to complete a questionnaire •>age 85