Calcium Strengthens Bones 钙可强健骨骼
Walking burns calories, may help reduce anxiety, and even strengthens bones.
多多走路可以有效消耗卡路里，放松心情减少忧虑，甚至可以增强骨骼。
Physiologists quickly linked these currents to bone growth in studies that seemed to explain why exercise strengthens bones and immobilization weakens them.
生理学家迅速将这些电流与骨骼生长在研究中联系起来，解释为何锻炼加强骨骼而固定使之减弱。
Running strengthens bones better than other aerobic activities, say University of Missouri researchers who compared the bone density of runners and cyclists.
密苏里大学的的研究员把跑步者和骑自行车的人的骨骼密度比较后说：跑步比其他的有氧活动更能强健骨骼。
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