but first, I want you

to make a little confession to me.

In the past year, I want you to just raise your hand

if you've experienced relatively little stress.

Anyone?

How about a moderate amount of stress?

Who has experienced a lot of stress?

Yeah. Me too.

But that is not my confession.

My confession is this: I am a health psychologist,

and my mission is to help people be happier and healthier.

But I fear that something I've been teaching

for the last 10 years is doing more harm than good,

and it has to do with stress.

For years I've been telling people, stress makes you sick.

It increases the risk of everything from the common cold

to cardiovascular disease.

Basically, I've turned stress into the enemy.

But I have changed my mind about stress,

and today, I want to change yours.

Let me start with the study that made me rethink

my whole approach to stress.

This study tracked 30,000 adults in the United States for eight years,

and they started by asking people,

"How much stress have you experienced in the last year?"

They also asked, "Do you believe

that stress is harmful for your health?"

And then they used public death records

to find out who died.

(Laughter)

Okay. Some bad news first.

People who experienced a lot of stress in the previous year

had a 43 percent increased risk of dying.

But that was only true for the people

who also believed that stress is harmful for your health.

(Laughter)

People who experienced a lot of stress

but did not view stress as harmful

were no more likely to die.

In fact, they had the lowest risk of dying

of anyone in the study, including people

who had relatively little stress.

Now the researchers estimated that over the eight years

they were tracking deaths,

182,000 Americans died prematurely,

not from stress, but from the belief

that stress is bad for you. (Laughter)

That is over 20,000 deaths a year.

Now, if that estimate is correct,

that would make believing stress is bad for you

the 15th largest cause of death

in the United States last year,

killing more people than skin cancer,

HIV/AIDS and homicide.

(Laughter)

You can see why this study freaked me out.

Here I've been spending so much energy telling people

stress is bad for your health.

So this study got me wondering:

Can changing how you think about stress

make you healthier? And here the science says yes.

When you change your mind about stress,

you can change your body's response to stress.

Now to explain how this works,

I want you all to pretend that you are participants

in a study designed to stress you out.

It's called the social stress test.

You come into the laboratory,

and you're told you have to give a five-minute

impromptu speech on your personal weaknesses

to a panel of expert evaluators sitting right in front of you,

and to make sure you feel the pressure,

there are bright lights and a camera in your face,

kind of like this.

And the evaluators have been trained

to give you discouraging, non-verbal feedback like this.

(Laughter)

Now that you're sufficiently demoralized,

time for part two: a math test.

And unbeknownst to you,

the experimenter has been trained to harass you during it.

Now we're going to all do this together.

It's going to be fun.

For me.

Okay. I want you all to count backwards

from 996 in increments of seven.

You're going to do this out loud

as fast as you can, starting with 996.

Go!

Audience: (Counting)

Go faster. Faster please.

You're going too slow.

Stop. Stop, stop, stop.

That guy made a mistake.

We are going to have to start all over again. (Laughter)

You're not very good at this, are you?

Okay, so you get the idea.

Now, if you were actually in this study,

you'd probably be a little stressed out.

Your heart might be pounding,

you might be breathing faster, maybe breaking out into a sweat.

And normally, we interpret these physical changes

as anxiety

or signs that we aren't coping very well with the pressure.

But what if you viewed them instead

as signs that your body was energized,

was preparing you to meet this challenge?

Now that is exactly what participants were told

in a study conducted at Harvard University.

Before they went through the social stress test,

they were taught to rethink their stress response as helpful.

That pounding heart is preparing you for action.

If you're breathing faster, it's no problem.

It's getting more oxygen to your brain.

And participants who learned to view the stress response

as helpful for their performance,

well, they were less stressed out,

less anxious, more confident,

but the most fascinating finding to me

was how their physical stress response changed.

Now, in a typical stress response,

your heart rate goes up,

and your blood vessels constrict like this.

And this is one of the reasons that chronic stress

is sometimes associated with cardiovascular disease.

It's not really healthy to be in this state all the time.

But in the study, when participants viewed

their stress response as helpful,

their blood vessels stayed relaxed like this.

Their heart was still pounding,

but this is a much healthier cardiovascular profile.

It actually looks a lot like what happens

in moments of joy and courage.

Over a lifetime of stressful experiences,

this one biological change

could be the difference

between a stress-induced heart attack at age 50

and living well into your 90s.

And this is really what the new science of stress reveals,

that how you think about stress matters.

So my goal as a health psychologist has changed.

I no longer want to get rid of your stress.

I want to make you better at stress.

And we just did a little intervention.

If you raised your hand and said

you'd had a lot of stress in the last year,

we could have saved your life,

because hopefully the next time

your heart is pounding from stress,

you're going to remember this talk

and you're going to think to yourself,

this is my body helping me rise to this challenge.

And when you view stress in that way,

your body believes you,

and your stress response becomes healthier.

Now I said I have over a decade of demonizing stress

to redeem myself from,

so we are going to do one more intervention.

I want to tell you about one of the most

under-appreciated aspects of the stress response,

and the idea is this:

Stress makes you social.

To understand this side of stress,

we need to talk about a hormone, oxytocin,

and I know oxytocin has already gotten

as much hype as a hormone can get.

It even has its own cute nickname, the cuddle hormone,

because it's released when you hug someone.

But this is a very small part of what oxytocin is involved in.

Oxytocin is a neuro-hormone.

It fine-tunes your brain's social instincts.

It primes you to do things

that strengthen close relationships.

Oxytocin makes you crave physical contact

with your friends and family.

It enhances your empathy.

It even makes you more willing to help and support

the people you care about.

Some people have even suggested

we should snort oxytocin

to become more compassionate and caring.

But here's what most people don't understand

about oxytocin.

It's a stress hormone.

Your pituitary gland pumps this stuff out

as part of the stress response.

It's as much a part of your stress response

as the adrenaline that makes your heart pound.

And when oxytocin is released in the stress response,

it is motivating you to seek support.

Your biological stress response

is nudging you to tell someone how you feel

instead of bottling it up.

Your stress response wants to make sure you notice

when someone else in your life is struggling

so that you can support each other.

When life is difficult, your stress response wants you

to be surrounded by people who care about you.

Okay, so how is knowing this side of stress

going to make you healthier?

Well, oxytocin doesn't only act on your brain.

It also acts on your body,

and one of its main roles in your body

is to protect your cardiovascular system

from the effects of stress.

It's a natural anti-inflammatory.

It also helps your blood vessels stay relaxed during stress.

But my favorite effect on the body is actually on the heart.

Your heart has receptors for this hormone,

and oxytocin helps heart cells regenerate

and heal from any stress-induced damage.

This stress hormone strengthens your heart,

and the cool thing is that all of these physical benefits

of oxytocin are enhanced by social contact

and social support,

so when you reach out to others under stress,

either to seek support or to help someone else,

you release more of this hormone,

your stress response becomes healthier,

and you actually recover faster from stress.

I find this amazing,

that your stress response has a built-in mechanism

for stress resilience,

and that mechanism is human connection.

I want to finish by telling you about one more study.

And listen up, because this study could also save a life.

This study tracked about 1,000 adults in the United States,

and they ranged in age from 34 to 93,

and they started the study by asking,

"How much stress have you experienced in the last year?"

They also asked, "How much time have you spent

helping out friends, neighbors,

people in your community?"

And then they used public records for the next five years

to find out who died.

Okay, so the bad news first:

For every major stressful life experience,

like financial difficulties or family crisis,

that increased the risk of dying by 30 percent.

But -- and I hope you are expecting a but by now --

but that wasn't true for everyone.

People who spent time caring for others

showed absolutely no stress-related increase in dying. Zero.

Caring created resilience.

And so we see once again

that the harmful effects of stress on your health

are not inevitable.

How you think and how you act

can transform your experience of stress.

When you choose to view your stress response

as helpful,

you create the biology of courage.

And when you choose to connect with others under stress,

you can create resilience.

Now I wouldn't necessarily ask