護理師協助行動受限的病人進行由床轉移至椅的過程，下列哪項動作展現了正確的人體力學？
A nurse is assisting a client with mobility limitations to perform bed-to-chair transfers. Which action demonstrates proper body mechanics?
- AMaintaining a narrow base of support with feet together雙腳併攏以保持狹窄支撐基底
- BBending at the waist to lift the client彎腰搬運病人
- CTwisting the torso while pivoting the client在旋轉病人時扭轉軀幹
- DKeeping the client's body close to the nurse's center of gravity✓ 正解使病人身體緊貼護理師的重心
人體力學的核心在於保護護理師脊椎，將病人重心靠近身體可減少腰椎承受的力矩壓力。彎腰（B）、扭轉軀幹（C）與底座狹窄（A）均會大幅增加腰椎受傷風險。正確姿勢應維持底座寬度、膝蓋微屈、利用腿部大肌肉群發力，並避免扭轉動作。
The core of body mechanics is to protect the nurse's spine; keeping the patient's center of gravity close to the nurse's body reduces the torque load on the lumbar spine. Bending at the waist (B), twisting the trunk (C), and a narrow base (A) all greatly increase the risk of lumbar injury. The correct posture is to maintain a wide base, slightly flex the knees, use the large leg muscles to generate force, and avoid twisting motions.
美台護理教育均高度強調人體力學，但美國臨床多推廣「無抬舉政策」（No-lift policy）並強制使用機械輔助，台灣則常受限於人力比而依賴護理師體力。