This is the best news I've heard all week!

這是我這禮拜聽到最好的消息！

Hey guys, Tara here for Dnews - with an interesting new study about exercise: the SILENT killer.

大家好，我是 Dnews 的 Tara，今天帶來的主題是一項有趣的新研究：運動——沈默殺手。

Now we've been taught to believe that exercise is great for us because most of the time it is!

我們一直被教導，運動有益身體健康，因為大部分時候確實是這樣！

But it turns out there's a small portion of the population who exercises too much, to the point where it may actually kill them.

但事實上，有一小部份的人會因運動過量到了會致死的地步。

Now chances are you've heard stories about people who are super healthy, run 20 miles every single day, and then all of a sudden boom, they just drop dead out of nowhere.

你有可能聽過一些關於超級健康的人，他們每天跑 20 哩然後突然有一天，「碰」的一聲，他們就沒來由地死掉了。

Most of the time, that's caused by cardiac hypertrophy, which is what happens when you exercise so much that your heart muscles get enlarged to the point where they obstruct your ventricles, until eventually you just die.

通常這是由心臟肥大所導致，而這種狀況常發生在運動過度之後，你的心肌不停增長直到阻塞心室，最後你就死了。

Now most of us don't have to worry about that because it only kills about 100 people per year in the U.S., and almost all of these people are insane crazy athletes.

不過我們一般人不需要擔心那些，因為在美國每年大約只有 100 人死於運動過度，而其中又多是瘋狂的運動員。

However, a new study out of Germany finds that high-intensity exercise puts us at risk for more than just cardiac hypertrophy.

然而，德國一項新研究顯示，高強度運動不只將我們暴露在心臟肥大風險中。

The results, which were published in the journal Heart, show that people with existing heart disease who "overdose" on high-intensity exercise may actually increase their risk of death from heart attack or stroke.

這項刊登在 Heart 期刊的研究結果顯示，已患有心臟疾病的人若是「過度」從事高強度運動，可能會增加自己因心臟病或中風而死的機率。

Researchers looked at over 1000 people, who had been diagnosed with stable coronary artery heart disease for 10 years or more, and they found that those who completed daily, strenuous exercise were more than twice as likely to die from a heart attack or stroke, than people who simply exercised moderately.

研究員觀察了超過 1000 位患有 10 年以上冠狀動脈心血管疾病的患者發現每天做劇烈運動的人死於心臟病或中風的機率是適度運動者的 2 倍。

By contrast, people who didn't exercise at all, were four-times more likely to die of a heart attack or stroke.

相較之下，完全不運動的人有 4 倍的機率會死於心臟病或中風。

Current guidelines say that heart disease patients should do up to an hour of moderate activity at least five times a week, which is still in line with the study.

目前的指引都說，心臟疾病患者每周至少能從事五次，每次長達一小時的適度活動。這和研究結果一致。

Although their results seem to take on a sort of reverse J curve where no exercise is really really bad, moderate exercise is ideal, and too much exercise is bad, but still not as bad as none at all.

儘管他們的研究結果近似於「反 J 曲線」也就是：不運動真的非常、非常不好，適度運動是理想的，運動過度雖然也不好，但也沒有比完全不運動還糟。

Now it might seem counterintuitive to think that exercise could possibly be bad for someone with heart disease, but other studies have found similar results.

運動對心血管疾病患者而言可能有害，這件事看似相當違背常理但其他研究也得到相似的結果。

Endurance training, in particular, has been shown to send the body into an acute inflammatory state that, over time, can damage the heart.

尤其耐力訓練已經證實會使身體達到激動狀態，時間一久就會傷害心臟。

Of course, none of this should serve as deterrent to exercise, unless you're running marathons every week.

當然，除非你每個禮拜都跑馬拉松，否則這些原因都不該成為我們運動的阻礙。

Not exercising at all, still has the worst possible outcome, but the intensity and duration of the exercise we do are also things we should be considering.

完全不運動仍然會導致嚴重的後果，但運動的強度和從事的時間，也是我們必須考慮的。

What do you guys think?

你們覺得呢？

Is high-intensity exercise gonna kill us all?

高強度運動真的會害死我們嗎？

I can't say for sure, but I'll tell you this much—it definitely won't kill me because I don't do it.

我不能明確地回答，不過我能肯定的是，它絕對不會害到我，因為我不從事高強度運動。

As always, if you have thoughts about this episode leave 'em in the comments below, and for more videos subscribe here.

如果你對這一集有任何想法，請在底下留言。如果想看更多影片，按這裡訂閱。