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Fit for Duty?

机译：适合当值吗？

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摘要

It should not be surprising that physical fitness and exercise improve long-term health. Studies have shown that sedentary people have twice the risk of coronary artery disease than active people as well as a higher risk of stroke, colon cancer, and back injuries. Only 22 percent of U.S. adults get at least 30 minutes of light to moderate exercise five or more times a week, and less than 10 percent exercise vigorously at least three times a week. More than 50 percent of deaths in the United States are attributable to these and other lifestyle choices.rnRegular physical activity helps to prevent coronary heart disease and assists with weight control. Weight training and strength exercises build muscles and endurance and enhance flexibility, thus protecting the body from injury and disability. Consistent physical activity has also been shown to reduce blood pressure, blood lipids, and glucose tolerance, thus helping to prevent hypertension, heart disease, and diabetes.
机译：身体健康和运动能改善长期健康也就不足为奇了。研究表明，久坐的人患冠心病的风险是活跃的人的两倍，并且中风，结肠癌和背部受伤的风险更高。仅22％的美国成年人每周至少接受30分钟的光照以进行5次或更多次中等强度的锻炼，而每周至少进行3次剧烈锻炼的人少于10％。在美国，有50％以上的死亡归因于这些以及其他生活方式的选择。定期进行体育锻炼有助于预防冠心病，并有助于控制体重。重量训练和力量锻炼可增强肌肉和耐力并增强柔韧性，从而保护身体免受伤害和残疾。还显示出一致的体育锻炼可以降低血压，血脂和葡萄糖耐量，从而有助于预防高血压，心脏病和糖尿病。

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