Osteoarthritis is a chronic degenerative disorder in which there is a loss of articular cartilage, bone hypertrophy, subdural sclerosis synovial membrane, and joint capsule involvement. In the late stages of OA ulceration softening and focal degeneration of articular cartilage are seen.

During normal ambulation in healthy knees, the medial compartment experiences 60%-80% of the weight-bearing load. This much load is present on degenerative cartilage in osteoarthritis.

These alterations cause biomechanical alterations like increased internal tibiofemoral rotation and peak knee adduction moment (KAM) contribute to the onset and progression of osteoarthritis.

Lateral trunk lean gait is a modification for OA knee patients to reduce knee adduction moment on the knee joint and reduce contact force on the medial compartment.

This study will be done to check whether the lateral trunk lean gait modification has a short-term effect on the pain of the knee joint and physical function in patients with knee osteoarthritis.

Patients with clinically diagnosed knee osteoarthritis using clinical diagnosing ACR criteria will be included. Consent will be taken from all the patients.

Patients will be assessed using the TUG test for knee function, the pain will be assessed using the VAS scale after including them in the study based on inclusion criteria. Then the patient will be assigned to one of the groups, the intervention group or control group by using the lottery method.

In the control group, convectional physiotherapy treatment will be given.

In the experimental group along with conventional physiotherapy treatment, the patient will be doing trunk lateral lean gait modification while walking for 7 days.

Trunk lateral lean gait is defined as a walking pattern characterized by a noticeable tilt or shift of the upper body to one side during the stance phase of gait. This lateral lean typically involves a deviation of the trunk away from the midline of the body.

For this patient will be trained. The patient will be standing in front of a mirror.

Then, the patient will be asked to lean lateral through the torso by 10⁰. 10⁰ lateral lean will be measured with a universal goniometer.

The patient will be trained to lean 10⁰ with visual, verbal, and tactile biofeedback.

This training will be included in the gait pattern. The patient will be asked to “At heel strike, lean sideways with the torso towards the foot on the most affected leg and return back slowly during stance phase.”

After completing the intervention for 7 days patient pain will be assessed using the VAS scale and knee function will be assessed using the TUG test. The scores will be recorded and the pre- and post-intervention scores will be analyzed statistically to get the result.