Why is physical activity important?
体育锻炼的必要性！
Regular physical activity is important for good health,and it's especially important if you're trying to lose weight or to maintain a healthyweight.
规律的体育锻炼对健康相当重要，尤其对于那些想减重或保持健康体重的人
When losing weight,more physical activity increases the number of calories your body uses forenergy or "burns off." The burning of calories through physicalactivity, combined with reducing the number of calories you eat, creates a"calorie deficit" that results in weight loss.
减重时，体育锻炼能够增加能耗燃烧热量，吃得少动得多，“能量赤字”有利于减重。
Most weight loss occursbecause of decreased caloric intake. However, evidence shows the only wayto maintainweightloss is to be engaged in regular physical activity.
多数减重源于能量摄入减少，但是，持续的减重一定有赖于规律锻炼。
Most importantly,physical activity reduces risks of cardiovascular disease and diabetes beyondthat produced by weight reduction alone.
更重要的是，规律的体育锻炼减少了冠心病和糖尿病风险，这是单纯的减重不具备的益处。
Physical activity also helps to–
体育锻炼还有助于——
·Maintain weight.
保持体重
·Reduce high bloodpressure.
降低高血压
·Reduce risk for type 2diabetes, heart attack, stroke, and several forms of cancer.
减少2型糖尿病、心脏病、卒中和某些癌症发病风险。
·Reduce arthritis painand associated disability.
减轻关节炎疼痛和相关残疾。
·Reduce risk forosteoporosis and falls.
降低骨质疏松症和跌倒风险。
·Reduce symptoms ofdepression and anxiety.
缓解抑郁和焦虑症状
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不作商业用途
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