2015考研英语阅读集中练Cancer and Staying Fit_大学英语阅读

2015考研英语阅读集中练Cancer and Staying Fit

　　Excess pounds lower the likelihood of survival after breast cancer. But for many women, maintaining a healthy weight is often a struggle, especially during treatment. Chemotherapy or radiation can make women feel too tired to exercise. Steroids given to help ease certain side effects of chemotherapy prompt a ravenous appetite. Nausea can lead to almost continuous nibbling of comfort foods to settle queasy stomachs. Some anticancer medications that work by tampering with hormones may have a hand in weight gain, too. One such hormonal drug is Tamoxifen, which keeps estrogen from entering breast cells by blocking receptors atop the cells that allow access. Studies have yet to confirm a connection, but many women on Tamoxifen complain of watching the scale inch upward. No matter what the root cause is for weight gain, exercise of all sorts helps burn calories. And paradoxically, for those who feel too wiped out to fit exercise in, some evidence shows light to moderate activities may actually alleviate treatment-induced fatigue。

　　Doctors once believed upper-body resistance training was apt to trigger the chronic swelling and discomfort of Lymphedema in women treated for breast cancer. Lymph is a thin, milky fluid that collects in spaces between cells. Carrying germ-battling immune cells, it seeps through a lacy network of channels in the body before draining into the circulatory system. Lymphedema occurs when lymph backs up, often in an arm or sometimes in the torso, after surgery or radiation alters lymph channels. Several recent studies suggest that a gradual approach and proper precautions make resistance training unlikely to raise the risk of developing Lymphedema or worsening it if it already exists.