2. 外语
  3. (1) We know the physical benefits exercise has on our bodies, but the wonders it can do for your brain aren’t limited either. "I

(1) We know the physical benefits exercise has on our bodies, but the wonders it can do for your brain aren’t limited either. "I

admin2023-01-09  62
问题     (1) We know the physical benefits exercise has on our bodies, but the wonders it can do for your brain aren’t limited either. "If exercise were a pill, it would be one of the most cost-effective drugs ever invented," says Dr. Nick Cavill, a health promotion consultant. Aside from its ability to perhaps halve your risk of major illnesses such as heart disease and cancer, exercise also extends benefits to the mind, improving mental health and wellbeing.
    (2) In the early 80s, exercise was shown to increase endorphin (内啡肽) levels in the blood. Through triggering a positive feeling, these brain chemicals play a part in the brain-boosting effects of exercise, but the complete story is more complicated and still far from understood. Scientists at the Cochrane Library have asked whether a daily dose of exercise might help everything from schizophrenia (精神分裂症) to sleep disorders, tobacco addiction to anxiety, and have offered explanations as to how it might bring about its benefits. Here’s what they (and others) have found.
    (3) " Individuals with schizophrenia can improve components of mental health by participating in regular exercise," write the authors of a review into exercise therapy for schizophrenia. Whether it’s regular walking or specific strength training, it’s thought that, aside from endorphin release, exercise might help by increasing social support and sense of autonomy, improving perceptions of competence, enhancing body image and by providing distraction. Definitive conclusions cannot yet be drawn though; more research is needed. The review included only 96 participants, with more men than women.
    (4) Mice are commonly used in medical research (but are not always the best fit since what works or doesn’t work in mice does not necessarily translate to humans). In one study in the British Journal of Pharmacology, nicotine-treated, wheel-running mice displayed fewer signs of withdrawal (such as tremor) when compared with a sedentary group.
    (5) Exercise also seems to help people quit smoking, by reducing cravings and helping to manage weight gain. It’s hard though to prove this with science, with results from more than 20 clinical trials finding no evidence that adding exercise to smoking cessation programs improves abstinence. An absence of scientific evidence is though just that, and it does not prove absence of effect. Real-life success stories abound.
    (6) Focusing especially on older people (since insomnia increases with age), one small study showed that people slept for about 42 minutes longer, and fell asleep about 11 minutes more quickly, when they had participated in a 16-week exercise program, consisting mainly of walking and low impact aerobics. Hard work, it seems, can pay off.
    (7) When scientists gathered data from more than 2,000 people in 39 small clinical trials, they found exercise perhaps to be as effective as drugs or talking therapy in reducing depression. Whilst awaiting results of larger, more robust studies they wonder whether the effects seen are down to elevation of brain chemicals or enhancement of self-image when mastering a new skill. Increased social contact and distraction can also help. In one case study, cold water swimming helped one woman with depression become medication-free. It is though important to realize that exercise alone is not enough to treat someone with severe depression.
    (8) "Whether wine is a food, a medicine or a poison depends on the dosage," stated Paracelsus, a philosopher in the 16th century, and the same is true for exercise. Writing in the British Journal of Pharmacology, Professor Jose Vina from the University of Valencia says that " dosing is extremely important to get the beneficial effects of exercise. In moderate doses, it causes very pronounced relaxing effects, but some may even become addicted to exercise".
    (9) In mild to moderate chronic fatigue syndrome, an individualized, person-centered program of exercise is needed; unsupervised or unstructured exercise may worsen symptoms. The National Institute for Health and Care Excellence is to publish new guidelines on this, stressing that different combinations of approaches are helpful for different people.
According to the passage, when exercising people should________.
选项 A、have the same approach of exercising
B、avoid having too much exercise
C、mainly walk and do low impact aerobics
D、focus on strength training
答案B
解析 细节题。本题需综合全文回答。原文第八段提到，剂量对于获得锻炼的有益效果非常重要。适量的话，它会产生非常明显的放松效果，但有些人甚至会对运动上瘾。由此可知，人们在锻炼时要适度，不能过度锻炼，因此本题答案为B“避免过度锻炼”。A“采用同一种锻炼方式”不符合原文第九段最后一句话提到的“不同的方法组合适用于不同的人”；C“以步行和低强度有氧运动为主”是原文第六段提到的一种锻炼方式，不符合题目要求，因此排除；D“注重力量训练”在原文第三段有所提及，但并不是本文针对锻炼给出的建议，因此排除。
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