護理師正在提供有關關節炎的管理教育。下列何種是非藥物方法，推薦用於骨關節炎（OA）？

核心概念：骨關節炎（Osteoarthritis, OA）是一種退化性關節疾病，其管理目標是減緩疾病進程、緩解疼痛及維持關節功能。此題重點在於非藥物治療策略。 為何正確答案 A 對：維持健康體重是 OA 管理的基石，因為過重的體重會增加下肢關節（如膝、髖）的負擔，加速軟骨磨損。低衝擊性運動（low-impact exercise），如游泳、騎自行車或水中運動，能在不對關節造成過度壓力下，增強關節周圍的肌肉力量，提供關節穩定性，同時維持關節的活動範圍（range of motion），這對延緩 OA 惡化及改善症狀至關重要。 為何其他選項錯： A. 完全休息：長期或完全的關節休息會導致肌肉萎縮、關節僵硬，反而可能加劇疼痛和功能障礙。適度的活動對關節健康是必要的。 C. 僅限負重運動：僅從事負重運動（weight-bearing exercise）可能對已受損的關節造成過度壓力。理想的運動計畫應包含低衝擊性運動，以平衡肌肉強化與關節保護。 D. 治療性超音波：超音波治療（therapeutic ultrasound）有時用於緩解疼痛，但其療效不如運動和體重管理等策略來得根本和持久，且對於疾病本身的長期控制效果有限。 臨床思路/安全優先：對於 OA 患者，護理師應倡導整合性的照護模式，結合生活方式的調整與適當的運動。體重管理和低衝擊運動是安全且有效的方法，能從根本上減輕關節壓力，改善關節功能，並預防進一步的損傷。教育病人了解這些策略的重要性，是提升其自我照護能力及生活品質的關鍵。

Core concept: Osteoarthritis (OA) is a degenerative joint disease, and management goals are to slow disease progression, relieve pain, and preserve joint function. This item focuses on non-pharmacological treatment strategies. Why the correct answer A is right: Maintaining a healthy weight is the cornerstone of OA management, because excess weight increases the load on lower-extremity joints (such as the knee and hip), accelerating cartilage wear. Low-impact exercise, such as swimming, cycling, or aquatic exercise, can strengthen the muscles surrounding the joint without placing excessive stress on it, providing joint stability while maintaining range of motion, which is crucial for slowing OA progression and improving symptoms. Why the other options are wrong: A. Complete rest: prolonged or complete joint rest leads to muscle atrophy and joint stiffness and may instead worsen pain and functional impairment. Moderate activity is essential for joint health. B. Weight-bearing exercise only: relying solely on weight-bearing exercise can place excessive stress on already damaged joints. An ideal exercise program should include low-impact exercise to balance muscle strengthening with joint protection. C. Therapeutic ultrasound: therapeutic ultrasound is sometimes used to relieve pain, but its efficacy is not as fundamental or long-lasting as strategies like exercise and weight management, and its effect on long-term disease control is limited. Clinical reasoning / safety priority: For clients with OA, the nurse should advocate an integrated care model combining lifestyle modification with appropriate exercise. Weight management and low-impact exercise are safe and effective methods that fundamentally reduce joint stress, improve joint function, and prevent further damage. Educating the client about the importance of these strategies is key to enhancing self-care ability and quality of life.