问题描述：
Please write a composition on the topic Sports and Health(运动与 健 康).You should write at least 100 words and base your composition on the outline below: 1.健康是非常重要的。 2.运动让我们保持健康。 3.我们应该参加运动。
最佳答案：
For thousands of years, physical activity has been associated with health. Today, science has confirmed the link, with overwhelming evidence that people who lead active lifestyles are less likely to die early, or to experience major illnesses such as heart disease, diabetes and colon cancer.
Exercise benefits every part of the body, including the mind. Exercising causes the body to produce endorphins, chemicals that lead a person to feel peaceful and happy. Exercise can help some people sleep better. It can also help with mental health issues such as mild depression and self-esteem. Plus, exercise can give people a real sense of accomplishment and pride at having achieved a certain goal - like beating an old time in the 100-meter dash.
Exercising can help you look better, too. People who exercise burn calories and look more toned than those who don't. In fact, exercise is one of the most important parts of keeping your body at a healthy weight. When you exercise, you burn food calories as fuel. If a person eats more calories than he or she burns, the body stores them away as fat. Exercise can help burn these stored calories.
Finally, exercising to maintain a healthy weight also decreases a person's risk of developing certain diseases, including type 2 diabetes and high blood pressure.
几千年来，体育活动一直与健康联系在一起。如今，科学已经证实了这一联系，大量证据表明，生活方式积极的人早死的可能性更小，患心脏病、糖尿病和结肠癌等重大疾病的可能性更小。
运动有益于身体的各个部分，包括大脑。锻炼会使身体产生内啡肽，一种能让人感到平静和快乐的化学物质。运动可以帮助一些人睡得更好。它还可以帮助治疗心理健康问题，如轻度抑郁和自尊。此外，锻炼可以给人们一种真正的成就感和实现某个目标的自豪感——比如在100米短跑中击败过去的对手。
锻炼也能让你看起来更好。运动的人比不运动的人燃烧卡路里，看起来更健美。事实上，锻炼是保持健康体重最重要的部分之一。当你运动时，你燃烧食物的卡路里作为燃料。如果一个人摄入的卡路里比他或她消耗的多，身体就会把它们储存为脂肪。运动可以帮助燃烧这些储存的卡路里。
最后，通过锻炼来保持健康的体重还可以降低患某些疾病的风险，包括2型糖尿病和高血压。
