听说久坐不健康，那久坐到底为什么不健康?_公共英语阅读理解

听说久坐不健康，那久坐到底为什么不健康?

Sitting is such a paradox. After a long day, you relish the opportunity to plop down on the couch and settle in for the evening. But cozy up in that same position all day long and you suffer a stiff neck, tight shoulders, and back pain. What gives? "Any position we hold for any length of time will eventually turn to pain because the body is not primed to do that," said Joan Vernikos, former NASA scientist a "Most people are sitting six to 13 hours a day. This immobility causes the illnesses we have come to recognize as modern disorders, like diabetes, obesity, cancers, heart conditions, and loss in blood volume," she said.

坐着也会让人又爱又恨。度过漫长的一天，你抓住机会扑通一声瘫坐在沙发上，然后就这么着度过一夜晚。纵然是这样保持同一个看似舒适的姿势一天，你也会感觉到，脖子僵硬，肩膀紧绷，背部酸痛，怎么会这样？我们长时间保持一个姿势，不管是什么姿势最终都会导致不适，因为身体没有准备好这么做。美国航天总署的科学家Joan Vernikos如是说“大部分人每天有6到13个小时都是坐着的，不动也会导致疾病，比如糖尿病，肥胖，癌症，心脏病，血量的减少等现代疾病。”

听说久坐不健康，那久坐到底为什么不健康?1

Your muscles are wasting away

肌肉量逐渐减少

When you sit all day, you know what your glutes and calves are doing? Pretty much nothing -- except slowly wasting away. This could make for a sore, wobbly walk home, when your legs finally start holding you up again. "It's not the number of hours sat that's important, it's how many uninterrupted hours of sitting that matters," said Vernikos. When conducting a study on people lying in bed 24 hours a day, she found that standing up every half hour was enough to prevent the harmful effects of an otherwise immobile lifestyle. Taking a load off (and keeping it off for hours on end) can also make the blood build up in your veins, which causes unpleasant sensations like burning and cramping in the calves. Ouch.