Emidio Pacecca 3 February 2021 Knee osteoarthritis: is it as debilitating as we think? Emidio Pacecca 3 February 2021 Osteoarthritis (OA) is the result of wear and tear of the joint cartilage. It can result in pain and stiffness when loading a joint. But is OA always a sign we need to protect our joints and stop certain activities? The answer may surprise you.