Effect of Short-term Motor Training on Accuracy and Precision of Knee Movement in Human With and Without Knee Pain

Inclusion Criteria: * • Aged 18-30 or 50-65 years * Free from ongoing or chronic pain * Right dominant leg * Speak and understand English * Aged 50-65 years. * Diagnosed with knee OA (according to American College of Rheumatology classification) with pain in left or both knees for more than six months * Have ongoing pain rated above 2 on a 0-10 Visual Analogues Scale (VAS) in the previous week. * Right dominant leg * Speak and understand English * Aged 50-65 years * Diagnosed with knee OA * Have had total knee arthroplasty on left or both knees * Right dominant leg * Speak and understand English Exclusion Criteria: * • Pregnancy or intent to become pregnant, breast feeding * Regular use of analgesics, including simple analgesia and NSAIDs * Frequent recreational drug or alcohol use * History of knee joint pathology or injury * Previous neurologic, musculoskeletal or mental illnesses * Practicing sport activities on a regular basis * Lack of ability to cooperate * Regular use of analgesics, including analgesia and NSAIDs for the last 24 hours * Frequent recreational drug or alcohol use * Previous neurologic, musculoskeletal or mental illnesses * Practicing sports activities on a regular basis * Lack of ability to cooperate * Regular use of analgesics, including analgesia and NSAIDs for the last 24 hours * Frequent recreational drug or alcohol use * Other disorders or injuries in the knee joints * Previous neurologic, musculoskeletal or mental illnesses * Practicing sports activities on a regular basis * Lack of ability to cooperate