A
Crossing your legs is an extremely common habit，which most people always ignore. While you may find it comfortable to sit with one knee crossed over the other, it might be causing health problems that you are not aware of.
A study published in Blood Pressure Monitoring stated that sitting with your legs crossed can increase your blood pressure，because the blood in your legs has to work against gravity to be pumped back to your heart, and crossing one leg over the other increases resistance, making it even harder for the blood to circulate. Certainly, you won’t feel any immediate effects, but you shouldn’t have your legs crossed for more than 15 minutes.
Crossing your legs can also lead to neck and back pain. When you sit with your legs crossed, your hips are in a twisted position. Not only does it cause one of your pelvic bones to rotate but also adds pressure on your lower and middle back and neck. So ideally it’s best for our bodies to sit with our feet planted flat, hip width apart, on the floor.
Moreover, your feet and legs might get painful or have the feeling of being asleep when you cross your legs for long periods of time. Since the veins and nerves are pressed, it can cause numbness and/or temporary paralysis in the legs, ankles, or feet. While the feeling of discomfort may only last a minute or two, repeatedly crossing your legs until they feel numb can cause permanent nerve damage.
So next time you sit down, try to get yourself in the habit of sitting with both of your feet on the floor. Not only will it help your posture and stability, but it will also save your health in the long run.
1. Which problem won’t sitting with your legs crossed cause?
A. Increased blood pressure B. Neck and back pain
C. Numbness D. Curving legs
2. How soon can we benefit from sitting with both of our feet on the floor?
A. In less than 15 minutes B. Only in a minute or two
C. For quite a long time D. In a month
3. Where is the text likely to be selected from？
A. A fiction B. A piece of newspaper
C. A textbook D. A journal of medicine
【答案】1. D 2. C 3. D
【解析】
这是一篇说明文。文章主要说明了交叉腿坐着不利于健康，它可能影响你的血压，造成颈部和背疼痛等。
【1题详解】
细节理解题。文章的二、三、四段分别提到交叉腿坐会增加你的血压，造成颈部和背部疼痛，造成腿部麻木，但没有提到会使腿弯曲，故选D。
【2题详解】
推理判断题。根据最后一段的Not only will it help your posture and stability, but it will also save your health in the long run.可知，从长远来看，双脚着地不仅会帮助保持你的姿势和稳定性，而且从长远来看它也会拯救你的健康，因此需要很长时间我们才能看出它的效果，故选C。
【3题详解】
推理判断题。本文主要讲述的是交叉坐着对健康的危害，再结合四个选项，由此可推断出本文应选自于医学杂志，故选D。
