The brain-changing benefits of exercise | Wendy Suzuki

The brain-changing benefits of exercise | Wendy Suzuki


What if I told you there was something
that you can do right now that would have an immediate,
positive benefit for your brain including your mood and your focus? And what if I told you that same thing
could actually last a long time and protect your brain
from different conditions like depression,
Alzheimer’s disease or dementia. Would you do it? Yes! I am talking about the powerful effects
of physical activity. Simply moving your body, has immediate, long-lasting
and protective benefits for your brain. And that can last
for the rest of your life. So what I want to do today
is tell you a story about how I used my deep
understanding of neuroscience, as a professor of neuroscience, to essentially do an experiment on myself in which I discovered
the science underlying why exercise
is the most transformative thing that you can do for your brain today. Now, as a neuroscientist,
I know that our brains, that is the thing in our head right now, that is the most complex structure
known to humankind. But it’s one thing
to talk about the brain, and it’s another to see it. So here is a real preserved human brain. And it’s going to illustrate two key areas
that we are going to talk about today. The first is the prefrontal cortex,
right behind your forehead, critical for things like decision-making,
focus, attention and your personality. The second key area is located
in the temporal lobe, shown right here. You have two temporal lobes in your brain,
the right and the left, and deep in the temporal lobe
is a key structure critical for your ability to form and retain new long-term
memories for facts and events. And that structure
is called the hippocampus. So I’ve always been fascinated
with the hippocampus. How could it be that an event
that lasts just a moment, say, your first kiss, or the moment your first child was born, can form a memory
that has changed your brain, that lasts an entire lifetime? That’s what I want to understand. I wanted to start and record
the activity of individual brain cells in the hippocampus as subjects were forming new memories. And essentially try and decode how
those brief bursts of electrical activity, which is how neurons
communicate with each other, how those brief bursts either allowed us
to form a new memory, or did not. But a few years ago,
I did something very unusual in science. As a full professor of neural science, I decided to completely switch
my research program. Because I encountered something
that was so amazing, with the potential to change so many lives that I had to study it. I discovered and I experienced
the brain-changing effects of exercise. And I did it in a completely
inadvertent way. I was actually at the height
of all the memory work that I was doing — data was pouring in, I was becoming known in my field
for all of this memory work. And it should have been going great.
It was, scientifically. But when I stuck my head
out of my lab door, I noticed something. I had no social life. I spent too much time
listening to those brain cells in a dark room, by myself. (Laughter) I didn’t move my body at all. I had gained 25 pounds. And actually, it took me
many years to realize it, I was actually miserable. And I shouldn’t be miserable. And I went on a river-rafting trip —
by myself, because I had no social life. And I came back — (Laughter) thinking, “Oh, my God,
I was the weakest person on that trip.” And I came back with a mission. I said, “I’m never going to feel
like the weakest person on a river-rafting trip again.” And that’s what made me go to the gym. And I focused my type-A personality on going to all the exercise
classes at the gym. I tried everything. I went to kickbox,
dance, yoga, step class, and at first it was really hard. But what I noticed is that after every
sweat-inducing workout that I tried, I had this great mood boost
and this great energy boost. And that’s what kept me
going back to the gym. Well, I started feeling stronger. I started feeling better,
I even lost that 25 pounds. And now, fast-forward a year and a half
into this regular exercise program and I noticed something that really
made me sit up and take notice. I was sitting at my desk,
writing a research grant, and a thought went through my mind that had never gone
through my mind before. And that thought was, “Gee, grant-writing is going well today.” And all the scientists — (Laughter) yeah, all the scientists
always laugh when I say that, because grant-writing never goes well. It is so hard; you’re always
pulling your hair out, trying to come up with that
million-dollar-winning idea. But I realized that
the grant-writing was going well, because I was able
to focus and maintain my attention for longer than I had before. And my long-term memory —
what I was studying in my own lab — seemed to be better in me. And that’s when I put it together. Maybe all that exercise
that I had included and added to my life was changing my brain. Maybe I did an experiment on myself
without even knowing it. So as a curious neuroscientist, I went to the literature to see
what I could find about what we knew about the effects
of exercise on the brain. And what I found was an exciting
and a growing literature that was essentially showing everything
that I noticed in myself. Better mood, better energy,
better memory, better attention. And the more I learned, the more I realized
how powerful exercise was. Which eventually
led me to the big decision to completely shift my research focus. And so now, after several years
of really focusing on this question, I’ve come to the following conclusion: that exercise is
the most transformative thing that you can do for your brain today for the following three reasons. Number one: it has
immediate effects on your brain. A single workout that you do will immediately increase
levels of neurotransmitters like dopamine, serotonin
and noradrenaline. That is going to increase your mood
right after that workout, exactly what I was feeling. My lab showed that a single workout can improve your ability
to shift and focus attention, and that focus improvement
will last for at least two hours. And finally, studies have shown that a single workout
will improve your reaction times which basically means that you are going to be faster
at catching that cup of Starbucks that falls off the counter, which is very, very important. (Laughter) But these immediate effects are transient,
they help you right after. What you have to do is do what I did, that is change your exercise regime,
increase your cardiorespiratory function, to get the long-lasting effects. And these effects are long-lasting because exercise actually
changes the brain’s anatomy, physiology and function. Let’s start with my favorite
brain area, the hippocampus. The hippocampus — or exercise actually
produces brand new brain cells, new brain cells in the hippocampus,
that actually increase its volume, as well as improve
your long-term memory, OK? And that including in you and me. Number two: the most common finding
in neuroscience studies, looking at effects of long-term exercise, is improved attention function
dependent on your prefrontal cortex. You not only get
better focus and attention, but the volume of the hippocampus
increases as well. And finally, you not only get
immediate effects of mood with exercise but those last for a long time. So you get long-lasting increases
in those good mood neurotransmitters. But really, the most transformative thing
that exercise will do is its protective effects on your brain. Here you can think
about the brain like a muscle. The more you’re working out, the bigger and stronger your hippocampus
and prefrontal cortex gets. Why is that important? Because the prefrontal cortex
and the hippocampus are the two areas that are most
susceptible to neurodegenerative diseases and normal cognitive decline in aging. So with increased exercise
over your lifetime, you’re not going to cure
dementia or Alzheimer’s disease, but what you’re going to do
is you’re going to create the strongest, biggest hippocampus
and prefrontal cortex so it takes longer for these diseases
to actually have an effect. You can think of exercise, therefore, as a supercharged 401K for your brain, OK? And it’s even better, because it’s free. So this is the point in the talk
where everybody says, “That sounds so interesting, Wendy, but I really will only
want to know one thing. And that is, just tell me
the minimum amount of exercise I need to get all these changes.” (Laughter) And so I’m going to tell you
the answer to that question. First, good news: you don’t have to become
a triathlete to get these effects. The rule of thumb is you want to get
three to four times a week exercise minimum 30 minutes an exercise session, and you want to get aerobic exercise in. That is, get your heart rate up. And the good news is,
you don’t have to go to the gym to get a very expensive gym membership. Add an extra walk around the block
in your power walk. You see stairs — take stairs. And power-vacuuming can be as good
as the aerobics class that you were going to take at the gym. So I’ve gone from memory pioneer to exercise explorer. From going into the innermost
workings of the brain, to trying to understand how exercise
can improve our brain function, and my goal in my lab right now is to go beyond that rule of thumb
that I just gave you — three to four times a week, 30 minutes. I want to understand
the optimum exercise prescription for you, at your age,
at your fitness level, for your genetic background, to maximize the effects of exercise today and also to improve your brain
and protect your brain the best for the rest of your life. But it’s one thing to talk about exercise,
and it’s another to do it. So I’m going to invoke my power
as a certified exercise instructor, to ask you all to stand up. (Laughter) We’re going to do
just one minute of exercise. It’s call-and-response,
just do what I do, say what I say, and make sure you don’t punch
your neighbor, OK? Music! (Upbeat music) Five, six, seven, eight,
it’s right, left, right, left. And I say, I am strong now. Let’s hear you. Audience: I am strong now. Wendy Suzuki: Ladies,
I am Wonder Woman-strong. Let’s hear you! Audience: I am Wonder Woman-strong. WS: New move — uppercut, right and left. I am inspired now. You say it! Audience: I am inspired now. WS: Last move — pull it down,
right and left, right and left. I say, I am on fire now! You say it. Audience: I am on fire now. WS: And done! OK, good job! (Applause) Thank you. I want to leave you with one last thought. And that is, bringing
exercise in your life will not only give you
a happier, more protective life today, but it will protect your brain
from incurable diseases. And in this way it will change
the trajectory of your life for the better. Thank you very much. (Applause) Thank you. (Applause)

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About the Author: Oren Garnes

100 Comments

  1. It's one of my favorite hobbies to watch TED talks to keep learning. I usually get fun, but this talk is one of the best I've ever seen! She is so passionate and her eyes just say how much she enjoys it. Actually, towards the end of the speech I was waiting for the final punch line or quote, but she actually went beyond that. Congrats! I think she'll never read this comment, but thank you very much for sharing your research on this!

  2. So happy to find this when i am going through depression and bipolar. I try my best to go to gym everyday and that does help with my mood !

  3. And then there's me in the Philippines who is apparently commuting from work to home for 3 hours already due to traffic, wanting to workout for 1 hr or 30 minutes, but I'm gonna be able to sleep at 11 PM if I workout tonight, so…. fucking how 😂😭

  4. Best medicine:
    Good diet
    Exercise
    Good sleep
    Social
    Reality:
    This lifesyle is expensive, and most people 8 hours a day, have to clean, run errands ect… Society is designed to keep us sick to relly on pharmaceuticals. That's how pharmacies make money. Society is designed to make us eat fast food. That's how restaurants make money. It's just how it is. 😮

  5. I've read that 10 minutes of jumping rope is equivalent to 30 minutes of jogging. I wonder if the benefits line up with the 30 minute minimum she suggests.

  6. She is an incredibly inspiring lady. The energy she is sharing with the audience feels so positive and after her speech, I've completely changed my attitude towards workouts and regular exercising.

  7. I loved the energy, and the experience was great. But nothing was said that hasn’t be seen on MyFitness Pal or Shape magazine. I would have thought that from a science standpoint and doing research NEW info would come out. Not so much an enlightening on self.

  8. Its very rare…. but you left me smiling at end of your video. I'm going to exercise now.

    Main thing to keep in mind tho is that aerobic exercise that gets the heart rate up is better than strength training for the brain.

  9. I put the cannabis down and started getting up every morning to shoot some hoops just so I could compete with some friends and get my body a little more active. The weight loss was honestly the smallest benefit, My whole attitude is just positive and my decision making improved with my confidence. Morning exercise has changed my life and I feel like this is a different type of high that cannabis could never give me. I didn't think I'd turn into one of those exercise everyday people but man I'm so happy and grateful that my body has the ability to be active. I even have longer days now, 12PM used to be my wake up time, Now I'm trying to find a 3rd activity to get into around 12PM lol. Exercise people, start small and you'll start to see life changing results!

  10. Hahahah I enjoy ths inspiring vedio and i go last part of this vedio enjoy talent of the scientist, dancer and singer.

  11. that is so true about catching falling things…I recently caught a falling can of a table and all my friends made matrix comments😂

  12. I’m literally watching this as I’m cycling lol. I agree 100% that exercise really changes your mood. I’ve started working out religiously about 1.5 years ago & I can honestly see that I’m a different person: someone who’s more positive & happier!

  13. That's all well and good, for you. Ive been participating in regular (most days) physical activity for the last 35 years and I still get distracted regularly, have deep and long low moods (not swings) and forget things..often simple words. And have been medically diagnosed with depression…so, what the..?

  14. Thought I was totally going to skip the gym today. Then Youtube recommended this video. AGHHHH I'm going to snap that barbell!!!!

  15. props to the men in the audience who proudly exclaimed that they are Wonder Woman strong , you are the backbone of our society

  16. It wasn't until I began running cross country that I gained a better understanding of neuroscience and I'm still continuing gain a deeper understanding.

  17. I got chills at with her last sentence I started working out it’s been a good two months holy crap does it change your life 😁😁😁😁😏😎✌️

  18. Brilliant! Not just preaching, but leading by example! 30 minutes 4 times a week is totally doable! Thanks for the information and inspiration.mi start today to do more excercise! 😃

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