14.High School English Listening

Dear A Moment of Science,
I like to exercise, but I suffer from migraines and worry thatgetting my sweat on at the gym could trigger a headache.
Am I right to be cautious?
Good question.
For some people, exercise can in fact lead to a migraine.
But most studies have shown that, onaverage, exercise may actually help ward off migraines.
At the very least, exercise doesn't seemto hurt most migraine sufferers.
Right,one study done in Sweden put more than ninety migraine prone folks into three groups:
one that exercised for around forty minutes three times a week, another that was given a drug toprevent migraines, and a third had regular relaxation sessions.
After three months, and then anadditional six months of follow up, the study found that migraines were reduced for people in allthree groups.
Another, smaller study examined more than twenty-five migraine sufferers before, during, andafter working out on stationary bikes.
After three months, the subjects all experienced fewerheadaches.
So at least according to these studies, exercise appears to be a viable alternative to migraine drugs.
To be clear, though, this doesn't mean that working out never triggers migraines.
Especially if you don't exercise regularly, it's probably best to ease into it and see how your headreacts.
If working up a sweat doesn't appear to trigger a headache, then you can gradually buildup to higher intensity workouts.
译文：
亲爱的 "科学时刻"。
我喜欢运动，但我患有偏头痛，担心在健身房流汗会引发头痛。
我的谨慎态度对吗？
好问题。
对某些人来说，运动事实上可能会导致偏头痛的发生。
但大多数研究表明，平均而言，运动实际上可能有助于抵御偏头痛。
至少，运动似乎不会伤害大多数偏头痛患者。
没错，在瑞典进行的一项研究将90多个容易患偏头痛的人分成三组。
其中一组每周锻炼三次，每次约40分钟；另一组服用预防偏头痛的药物；第三组则定期进行放松训练。
三个月后，再经过六个月的跟踪调查，研究发现这三组人的偏头痛都有所减少。
另一项规模较小的研究对超过25名偏头痛患者在骑固定式自行车锻炼之前、期间和之后进行了检查。
三个月后，受试者的头痛都减少了。
因此，至少根据这些研究，运动似乎是偏头痛药物的一个可行的替代品。
不过，要清楚的是，这并不意味着锻炼永远不会引发偏头痛。
特别是如果你不经常锻炼，最好是放松一下，看看你的头部反应如何。
如果锻炼出汗并没有引发头痛，那么你可以逐渐增加锻炼的强度。
重点词汇：
suffer from 受折磨 ; 受害于
sweat on <俚>依靠，指望
be cautious 逯；小心；毖
some people 某些人
ward off 避开，躲开，防止
more than 比…更;比…更重要 ; 超出需要;超乎寻常
and then 然后