對於退化性關節炎病人，下列哪些活動有助於維持關節健康？（選所有適合的）
Which of the following activities are appropriate for a client with osteoarthritis to maintain joint health? (Select all that apply.)
- ASwimming✓ 正解游泳
- BHigh-impact aerobics高衝擊有氧運動
- CRange-of-motion (ROM) exercises✓ 正解關節活動度（ROM）運動
- DCycling on a stationary bike✓ 正解騎固定式腳踏車
- ERunning on concrete sidewalks在水泥人行道上跑步
退化性關節炎（Osteoarthritis）的運動原則是「低衝擊、強化支持肌肉」。游泳與水中運動因水的浮力可減輕關節負重；關節活動度（ROM）練習可維持關節靈活度；固定式腳踏車可強化股四頭肌以穩定膝關節，且無路跑的衝擊力。高衝擊運動（如跑步、有氧跳躍）會對軟骨造成過度壓迫，加速關節磨損，應盡量避免。
The exercise principle for osteoarthritis is "low-impact, strengthening of supporting muscles." Swimming and aquatic exercise use the buoyancy of water to reduce joint load. Range-of-motion (ROM) exercises maintain joint flexibility. Stationary cycling strengthens the quadriceps to stabilize the knee and avoids the impact of road running. High-impact activities (such as running and aerobic jumping) place excessive compressive forces on cartilage, accelerating joint wear, and should be avoided whenever possible.