2月19日CNN聽力：大腦開釋內啡肽體驗活動快活感的本源
大腦開釋內啡肽體驗活動快活感的本源 美國鬼才樂隊秀創意零重力下拍攝另類MV
Two words we hear so often when it comes to howwe look: diet and exercise.
And it turns out that how we feel about ourselvesmay also be tied to working out.
The doctor is here to look at the cerebral connectionbetween getting fit and feeling good.
Regular workouts are worth a lot more than a six-pack.
Look, we all know how good exercise is for your body-healthier heart, healthier lungs.
But did you ever thought about just how good exercise is for your brain?
Sure, you probably heard somebody tell you that endorphins are released when you exercise.
But what does that really mean?
Well, here's a way to think about it:
when you start working out, your brain recognizes it as a moment of stress, as your heartblood pressure increases, the brain thinks that you either fighting an enemy or you're fleeingfrom one-fight or flight.
Protect yourself and your brain from stress, you release this protein known as BDNF, brainderived neurotrophic factor.
This is pretty cool stuff.
At the same time, endorphins, another chemical to fight stress, are released by the pituitarygland.
Endorphins minimize the discomfort of exercise, they block the feeling of pain.
They're even associated with feelings of euphoria.
And here's something else: research published in the scientific journal "Nature" for just peoplewho exercise have increased gray matter in the brain.
That's the brain.
But I also want to let you in on a little secret:
exercise offers a serious self-esteem boost.
That could be the endorphins as well.
Working out not only changes your physical appearance, but it also affects the way that yousee yourself.
According to the recent Gallup poll, Americans who exercise most feel the best about theirappearance.
You don't need space to experience zero gravity.
All you need is a jetliner, a parabola and voila, you're weightless.
A pilot throttles the plane and aims at 45 degrees up, then he suddenly puts it in a dive andno matter what your stomach does, you're weightless for 27 seconds.
It's enough to shoot parts of a music video if you plan it right.
Don't try this aboard your next commercial flight.
The band known for its unique videos, now, they're treading in zero gravity in a plane aboveRussia.
For three weeks, they practiced and performed as the plane did parabolas climbing until it goesover the hump, creating 27 seconds of weightlessness-time to open luggage and release azillion balls.
Lead singer Damian Kulash called the whole zero-G experience exciting and terrifying.
Russia's S7 airline offered OK Go the plane in exchange for using the results in a marketingcampaign.
The video that's made up of eight periods of weightlessness with a time in between as theplane repositions edited out.
The band members took anti-nausea drugs, but the production crew wanted to go natural.
We had about 58 unscheduled regurgitation.
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