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Knee stiffness is one of the most bothersome symptoms of joint osteoarthritis, and its treatment approach varies depending on the cause and severity of the condition. However, recent evidence shows that braces (supportive knee braces) outperform common non-drug alternatives in the "stiffness" index, while therapeutic exercises and aquatic therapy remain effective complementary options. In a network analysis that included randomized trials published in PLOS ONE (June 2025), braces topped the effectiveness ranking on the WOMAC stiffness scale, followed by exercises and then aquatic therapy, while other methods ranked lower. Recent reviews and studies support the role of targeted exercise (including yoga and strengthening exercises) in improving pain and function, along with promising evidence for gait retraining to reduce load on the joint, which decreases pain and may slow cartilage degeneration. Practically, the pathway begins with conservative options (healthy weight, appropriate brace prescribed by a specialist, a progressive exercise program supervised by a physical therapist, and incorporating aquatic sessions when possible), with periodic evaluations to adjust the plan. In selected cases, low-dose radiation therapy appears as a promising conservative option for pain in mild to moderate osteoarthritis, pending its clinical establishment.