Walking speed after total knee arthroplasty (TKA) can be used as a simple tool to monitor postoperative recovery. There are different protocols for gait assessment in patients with TKA. The 30 Second Fast Walk Test (30SFW) is a simple, low-cost and easy-to-apply assessment method that requires very little equipment in clinical settings. 30SFW is a reliable, valid test of walking ability in patients with knee osteoarthritis (OA).

Objective: To investigate the reliability and validity of the 30SFW test in the evaluation of gait in patients with TKA.

Inclusion Criteria:patients who had primary TKA surgery at least six months ago, being diagnosed with preoperative knee OA, and volunteering to participate in the research -

Exclusion Criteria:had a previous orthopedic, neurological, or systemic disease that effects walking or standing, body mass index of 40 kg / m2 and over, having any other surgery on the same limb that effect walking, and revision TKA.

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patients who had primary TKA surgery at least six months ago