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

　　That s important news. Resistance training helps reverse the muscle loss and fat gain called Sarcopenia that often follows chemo-therapy and hormonal therapy. Itˊs helpful in other ways, too. Osteoporosis, which sets the stage for life-altering bone fractures, may be hastened by certain anticancer treatments. Chemo-therapy, for example, sometimes pushes women into early menopause by pre-maturely shutting down their ovaries. Since estrogen helps protects bones, losing it speeds bone-thinning, particularly in the spine and hips, which are especially vulnerable to fractures. Also known to contribute to osteoporosis is a class of breast-cancer drugs called aromatase inhibitors that cut off the most plentiful supply of estrogen after menopause by interrupting the process that converts androgens into estrogen. Resistance training slows bone loss and may even strengthen bones.

　　Quality of life counts, too. In clinical trials, moderate to vigorous exercise programs notched up progressively to 45-minute sessions at least three times a week eased anxiety and depression, enhanced mood and self-esteem, and helped counter fatigue.

　　Thus far, there are few studies of exercise in women with advanced breast cancer, although early evidence suggests that physical activity offers benefits here, too, such as less fatigue. More rigorous studies investigating links between breast cancer and exercise are underway. Dont settle back to await developments, though. Rise from your reading and head out for a walk.