The Art of Manliness - February 10, 2020


#583: How to Stay Mentally Sharp and Fulfilled as You Age


Episode Stats

Length

38 minutes

Words per Minute

165.37537

Word Count

6,439

Sentence Count

405

Misogynist Sentences

2

Hate Speech Sentences

10


Summary

Everyone gets old, but not everyone experiences old age the same way. Some folks spend the last few decades of their life sick, sad, and stagnating, while others stay sharp and find great satisfaction in the twilight years of life. My guest today is a neuroscientist who s dug into the research on what individuals can do to increase their chances of achieving the latter outcome, instead of the former. His name is Daniel Levenson, and today we discuss his latest book, Successful Aging: Neuroscience Explores the Power and Potential of Our Lives.


Transcript

00:00:00.000 manliness podcast. Everyone gets old, but not everyone experiences old age the same way. Some
00:00:13.920 folks spend the last few decades of their life sick, sad, and stagnating while others stay sharp
00:00:18.080 and find great satisfaction in the twilight years of life. My guest today is a neuroscientist who's
00:00:22.340 dug into the research on what individuals can do to increase their chances of achieving the latter
00:00:26.300 outcome instead of the former. His name is Daniel Levedon, and today we discuss his latest book,
00:00:30.320 Successful Aging, Neuroscience Explores the Power and Potential of Our Lives. We begin our conversation
00:00:35.020 discussing the societal narratives that we have about old age that don't always hold true. We
00:00:38.740 then dig into the fact that while the brain slows in some ways with age, it's sharper in other ways.
00:00:43.000 Daniel shares the personality trait that's the biggest predictor of successful elderhood and
00:00:46.820 the recognizable yet surprising reason the idea that memory declines with age is overblown. We
00:00:51.440 also talk about what really works for preserving your memory and keeping your mind agile and keen,
00:00:55.100 and no, it's not doing puzzles and brain games. We end our show discussing the question of whether
00:00:59.100 people get happier or sadder as they age. After the show's over, check out our show notes at
00:01:02.960 aom.is slash successful aging. All right, Daniel Leviton, welcome to the show.
00:01:21.920 Thank you, Brett.
00:01:22.400 So you are a neuroscientist and a cognitive psychologist who has written books about
00:01:27.500 thinking clearly. That book was An Organized Mind, The Organized Mind, fantastic book,
00:01:31.600 and also how music affects our brain. And you got a new book out called Successful Aging,
00:01:37.060 a neuroscientist explores the power and potential of our lives. So what kick-started your research
00:01:41.580 and writing about getting older and how it affects the brain and everything else about our lives?
00:01:46.060 Yeah, it's maybe not an obvious transition from the other books, right? But as I've gotten older
00:01:51.400 myself, I couldn't help but notice that some people tend to age better than others. Why would
00:01:59.120 that be? I have colleagues who are in their 90s who are still as sharp as ever. Others in their mid-60s
00:02:05.400 who have slowed down so much they can't do their work. There are clearly some individual differences
00:02:11.500 there. And as a neuroscientist and a cognitive scientist who studies individual differences,
00:02:16.780 I find this intriguing. I really wanted to be able to give advice to my parents who are 85 and 87 and
00:02:25.260 still doing well about how they could remain that way. And selfishly, I wanted to know what I could do
00:02:32.600 to stay as engaged and energetic as they are as I get older. And so I looked all around for books
00:02:40.560 about this and I couldn't find any. So as with my other books, I basically wrote the book that
00:02:46.020 I wanted to read.
00:02:47.940 And I think that's true. One thing I've noticed as I've gotten older is you look for books as you're
00:02:53.120 in your 30s, your 40s about how do I transition to mid-life? And there's nothing really there.
00:02:59.580 There's a lot of stuff on kids or teenagers, but sometimes that latter half of life gets
00:03:05.000 overlooked on providing guidance.
00:03:07.280 Right. And so, you know, I wasn't thinking, well, I need to fill a hole in the library or in the
00:03:13.160 bookstore, but I wanted to read that book.
00:03:16.400 So let's start off with misconceptions that people have about aging. Or maybe they're not
00:03:20.800 misconceptions because, as you said, there's differences on how people age. So sometimes we
00:03:25.960 see ways one person ages and think, well, that's just how all people age. So what are some of the
00:03:30.820 common things that we think about or associate with aging and cognitive performance and just
00:03:35.300 overall vitality in life?
00:03:37.180 Well, we do have some biases in our culture, a kind of ageism. And the biases, the way memory works
00:03:43.420 is that if you're going into an experience with a bias, you tend to notice all of the things that
00:03:50.280 confirm that. We call it confirmation bias. So if you already think that old people are decrepit
00:03:56.020 and declining and you see a few of them, those are the ones you notice and register. And you don't
00:04:02.420 notice all the exceptions to that. And in fact, in my experience, there are more oldsters who are doing
00:04:08.260 well than are not doing well. And just to continue the thought, I feel I'm noticing, I'm certainly not
00:04:16.260 the first to notice it, but I'm noticing it more acutely that oldsters have become marginalized.
00:04:22.460 I saw it in my own life. My grandfather was forced into early retirement, and as was my father.
00:04:29.980 And I'm on some committees, some academic committees for hiring in Germany for the Max Planck Institute
00:04:36.960 there. And Germany still has mandatory retirement at age 67. So I would call that a form of ageism.
00:04:47.500 The societal narrative is that old people need to get out of the way and make room for youngsters.
00:04:54.380 And so one misconception is that old age is a time of decline and debilitation,
00:05:01.520 sadness and irrelevance. It is for some, but for many, it's the best parts of their lives.
00:05:07.960 And for those who get to interact with them.
00:05:11.140 And we'll talk about how some of the benefits of aging that you get as you get older, that you
00:05:16.920 don't have when you're younger. And I think it's that idea of this societal narrative. I've noticed
00:05:21.780 that I feel like our ideas of what old people are, are still like, they're stuck in like the 1920s or
00:05:28.080 30s, right? When like, you look at old pictures of like a grandpa who was, you know, 55, and they
00:05:33.420 looked really, really old because they're probably working in the fields. Healthcare wasn't that
00:05:38.740 great. I remember this movie, there's like this woman, she was 60 and she's a grandma and she's
00:05:43.200 wearing this brooch and she like walked all decrepitly. But like 60, because he thinks of
00:05:47.900 advanced in healthcare, like you can be like you're 40 when you're 60.
00:05:51.840 60 is the new 40 and hey, 80 is the new 60.
00:05:56.180 Right. So that means our, so what has happened is our narrative hasn't caught up to the reality
00:06:00.880 of aging in the 21st century.
00:06:03.540 Right. I think that's right.
00:06:04.600 So let's talk about, so you're a neuroscientist, so you look at the brain and how it changes.
00:06:09.160 And we all know that the brain undergoes rapid changes physiologically in childhood. And then
00:06:15.460 in the teenage years, it's sort of like a rewiring. And I think people tend to think,
00:06:18.980 well, after you're done, you know, after you're 20, your brain's kind of set in stone. What you got
00:06:23.360 is what you got. But you highlight research that our brain continues to physically change as we get
00:06:29.160 older. So what's, what's going on there as we hit our forties, fifties, and sixties with our brain?
00:06:33.760 Well, so the brain is constantly rewiring itself at any age. It's true that thinking becomes slower
00:06:42.020 with every decade after 40 and parts of the brain shrink. Thinking becomes slower for a number of
00:06:49.320 reasons. One is we enter a process of demyelination. Myelin is a fatty sheath that coats neurons and acts
00:06:58.080 as an insulator. And by an analogy to an electrical circuit, you know, if the, if the insulation on the
00:07:05.920 wiring in your house gets frayed or, or degraded, you could have sparks and then the electricity isn't
00:07:12.840 all going to where you want it to go. It's some of it's being lost and can cause damage. And that's
00:07:20.680 what happens in brains. The myelin begins to decay. That's some of the slowing, but not all of it.
00:07:26.780 There are a number of reasons, but the good news here is that a variety of compensatory mechanisms
00:07:33.360 kick in even as the slowing occurs. Now, one form of rewiring is the ability to see patterns in the
00:07:42.200 world that is improved among oldsters. And that's true, whether it's the social world or the perceptual
00:07:51.000 world. So my view and, and, you know, growing community of people who share the view is that
00:07:56.360 we do become more intelligent in the way that we're using the word as we age, because we're acquiring
00:08:02.340 more information. We're having more experiences. We learn from teachers, books, friends, newspapers,
00:08:09.160 interactions with the world, social encounters, and that adds to our intellect.
00:08:14.200 So it sounds like, correct me if I'm wrong. This is how I'm understanding. In some ways,
00:08:18.980 yes, we slow down as we get older, but in some ways we speed up because of that accumulation of
00:08:23.640 what we can, I mean, we call mental models, right? You're able to see patterns more readily in the
00:08:28.260 environment because you've had so much experience. So you can make a decision faster just based on
00:08:33.560 just recognizing a pattern as opposed to say a younger person who hasn't had that experience.
00:08:38.540 They have to spend a lot of time spinning wheels to figure out on the fly what to do.
00:08:42.400 Yeah. I always say, if you've got some sort of a growth and you get an x-ray and you want to know
00:08:50.820 whether it's cancerous or not, you want a 70-year-old radiologist, not a 30-year-old radiologist.
00:08:56.680 You want somebody who's seen thousands of these things. That's pattern matching.
00:09:01.200 Yeah. So that's a case for keeping on older employees or employee, maybe having them in their
00:09:07.000 60s, 70s, 80s continue to work because they can bring so much accumulated knowledge
00:09:11.580 to the field.
00:09:14.280 They can. And they also bring knowledge of social interactions and the kinds of mistakes that have
00:09:22.100 been made before.
00:09:24.020 And that's why, I mean, you see, it's sort of this pattern recognition. You see, that's
00:09:27.060 what judges do. And a lot of judges can continue doing their job into their 90s and do it very well.
00:09:33.720 You're right. And I had the opportunity to spend time with the federal judge, Jack Weinstein,
00:09:40.360 who's 98 years old and handles a full caseload. And in fact, he's so sharp and so good at discerning
00:09:47.700 patterns in behavior and in court documents that other federal judges in his district often hand him
00:09:54.680 the most difficult cases. He's that good. And we see it in good police detectives and FBI agents and
00:10:02.420 profilers who are able to detect patterns that elude the rest of us. And that's based on experience.
00:10:09.400 So thinking slows in some ways when we age, but sharpens in other ways, and the brain continues
00:10:14.960 to rewire itself even as we age. Why is it then that it seems like many older people struggle with
00:10:19.980 adopting new technology?
00:10:21.980 I think older people have difficulty with new technology just because for neural reasons and
00:10:29.960 for psychological reasons, as we get older, we become a bit more conservative. I don't mean that
00:10:37.060 in a political sense necessarily, but you could broadly characterize the lifespan as consisting of
00:10:46.520 different chunks, where as a child, you're trying to acquire the information that will allow you to
00:10:54.300 become somewhat self-sufficient, to go to the bathroom yourself, to read, to entertain yourself,
00:11:00.700 to make friends and choose your friends. In early young adulthood, our 20s and 30s,
00:11:07.060 we're seeking out, maybe starting in the teen years, we're acquiring information for a different
00:11:14.420 purpose. We want to understand what we like and what we don't like. What kind of person am I?
00:11:19.180 Am I somebody who likes to do this? And so we try a lot of different things, some of us more than
00:11:24.960 others, but the time of exploration is the late teens and 20s. Then come the 40s, most of us settle down
00:11:33.980 a bit and work to build up our careers, possibly build up a nest egg, a family. And by the time we
00:11:40.620 hit 60 or so, we're less interested in exploration and in finding out what things we might like. We
00:11:48.460 already know what we like. We come more interested in spending our time doing the things we already know
00:11:55.440 we like. And so this whole mindset means we're less likely to try new restaurants or want to make new
00:12:05.460 friends, explore new places. That's not a positive brain health perspective. And I argue in the book
00:12:14.880 that we have to fight against that kind of complacency. And the connection to technology is,
00:12:20.740 for a lot of older people, it's just, why does this have to change? I liked the old system.
00:12:25.600 I was used to it. Why do I have to learn this new thing? And the icing on the cake is that with all of
00:12:34.480 this as a feature of old age going back centuries, we've really seen a tipping point or a sea change
00:12:44.780 in the rapidity of technology. If you were 80 years old, a hundred years ago, so let's say 1920,
00:12:53.860 you were seeing for the first time things like women getting the vote, automobiles, airplanes,
00:13:02.260 telephones, radio. That was a lot of new technology in your lifetime, but it came along rather slowly.
00:13:11.060 Now there's new operating systems and cell phones become obsolete and the OSs they run on become
00:13:18.940 obsolete. So I'm thinking about my parents who, you know, every couple of years, the landscape
00:13:25.960 completely changes. That's a very rapid landscape of cell phones and websites and, you know, computer
00:13:33.140 stuff. That's a very rapid change, comparatively speaking.
00:13:38.560 Right. So, but some older people do still manage to be open to learning new things and not sort of
00:13:47.120 just go into their, like, what the stuff they're comfortable with. And you talk about it at the
00:13:50.220 beginning of the book that the research shows our personality plays a big role in whether we age
00:13:55.280 successfully. And personality is, I mean, sometimes associated with temperament. So it's like
00:13:59.840 openness, conscientiousness, agreeableness, and then what's the other one?
00:14:05.220 Neuroticism.
00:14:06.600 Yeah. And extroversion.
00:14:09.440 So, I mean, what personality traits of those are associated with successful aging?
00:14:14.020 Well, two in particular, and one of them dominates everything else. And it's a cluster of
00:14:18.860 traits that has to do with conscientiousness. It turns out that the biggest predictor of how well
00:14:26.120 you'll age, I mean, apart from whether you were in a war or got hit in the head or things like that,
00:14:33.120 the biggest predictor is conscientiousness and a cluster of traits surrounding that. Because,
00:14:40.100 look, conscientious people go to the doctor when they're sick. They have a doctor. They know who to
00:14:45.940 call. And when the doctor gives them medication, they actually follow the instructions and they take
00:14:51.200 it. They do what the doctor tells them. Conscientious people tend to not spend all their
00:14:57.540 money. So they have a nest egg for when something bad goes happen. They've built up a retirement fund.
00:15:03.380 And you're born with a genetic predisposition towards conscientiousness. You can change. I mean,
00:15:10.200 the entire field of psychotherapy is based on the idea that you can change. You can change your
00:15:16.400 personality at any age. Now, there are certainly a number of quacks in the field, but there are some
00:15:22.440 very good and serious psychotherapists who really do help people. And you can become more conscientious
00:15:31.440 even at the age of 60 or 70. In fact, getting a disease like diabetes often causes people to become
00:15:38.580 more conscientious. They realize they have to or they'll die. And what about, isn't openness another
00:15:44.460 personality trait? Yeah, that's an important one. And that gets back to what we were just talking
00:15:49.680 about a moment ago. We do become complacent and we close down. We tend to close down our social worlds
00:15:57.200 as we age. We don't want to make new friends. We want to spend time with our old friends.
00:16:02.600 Part of this has to do with something that Laura Karstensen, a great aging psychologist,
00:16:08.980 discovered, which is that we tend to allocate our time based on how much of it we think we have left.
00:16:16.740 And 60, 65, 70, 75, these are milestones. And even if we have a good chance of living to 100 now,
00:16:25.960 there's a different sense that your time might be limited than when you're 20 or 30.
00:16:31.900 And you don't want to spend it on things that might not pan out. You don't want to go to spend an
00:16:37.260 evening in a restaurant that you might not like, or with a person you might not enjoy, or worse,
00:16:43.120 somebody who'll make you feel bad about yourself. But the research says that although that's a
00:16:48.900 tendency, we have to fight against it. We have to rage against it and try new things. That's a key
00:16:56.020 to mental health, being open to new experiences. All right. So that sounds like, the takeaway from
00:17:01.600 this, I think, is, okay, if you want to have a successful elderly part of your life,
00:17:07.760 if you're not very conscientious now, start getting conscientious. So start saving for retirement,
00:17:11.960 take care of your health now, exercise, eat right, because that'll benefit you as you get older. Your
00:17:17.360 80-year-old self will thank your 40-year-old self. And also, as you get older, you have to
00:17:23.080 consciously fight that tendency for you to close yourself off to new experiences and just
00:17:28.000 always look for ways to experience new and novel things. So another thing that people associate
00:17:32.560 with old age is their memory going away or faltering. Do we really become more forgetful
00:17:38.520 as we get older? Well, certainly some people do suffer memory loss, and it can be debilitating.
00:17:46.600 Of course, this is a hallmark of Alzheimer's, but there is new research that shows this has all been
00:17:51.580 overblown and oversold. That is that, yes, memory decline does occur, but it's not as bad as we make
00:17:59.220 it out to be. I'm in a job where I get to deal with 17 and 18 and 19 and 20-year-olds all the time.
00:18:06.640 I'm a college professor. And I can't tell you the number of times that 20-year-olds, 20-somethings,
00:18:13.040 have showed up at the wrong classroom, even eight weeks into the semester, or showed up at the wrong
00:18:19.780 time, or forgotten about an exam, or held up their hand and I call them two seconds later and they
00:18:25.940 forget what they were going to ask. And 70-year-olds have these kinds of memory lapses too.
00:18:32.460 You go to a closet, you don't remember why you went there, you walk into the kitchen,
00:18:37.200 you knew you had a reason, but you don't know why you're there, you retrace your steps, you forget a
00:18:41.900 name, you show up at an appointment at a wrong time. The difference is the narratives,
00:18:48.400 the stories we tell ourselves. The 20-year-old says, oh, geez, I must have drank too much last
00:18:55.740 night, or man, I got to get more than five hours of sleep, or I got too many balls in the air.
00:19:02.180 The 70-year-old says, oh my God, I've got Alzheimer's, this is the end. But it's the same
00:19:07.400 behavior. We're going to take a quick break for your word from our sponsors. And now back to the show.
00:19:13.740 No, when you said that, I do that now with like, just little pains in your body. Like when you're
00:19:18.940 like 15 or 20, you're like, oh, I might've just tweaked it, doing whatever. But now I'm like, oh my
00:19:23.820 gosh, this could be cancer. Like, this is it. I'm having a heart attack.
00:19:31.860 Right. Brett, you sound like a catastrophizer.
00:19:35.300 Yeah. Well, yeah, I got to work on the neuroticism of my personality.
00:19:39.180 Well, and yet a certain amount of neuroticism drives conscientiousness. So if you go to the
00:19:46.560 doctor and they catch that cancer in time, you've just won the race. That was good. But I guess if
00:19:53.460 you go to the doctor six times a week, that might be on the far side of neuroticism.
00:19:59.020 I don't do that. I just go to Dr. Google and look things up, which my pediatrician,
00:20:04.860 my doctor probably doesn't appreciate. So yeah, memory, so it's not as bad as we think,
00:20:09.160 but what can we do to stem memory loss as we get older? Because it does happen a bit,
00:20:14.460 but not as bad as we think we do. So are there things like proactively we can do to
00:20:17.800 keep our memory sharp as we get older?
00:20:20.280 Yeah. I should say that there's been a lot of talk about brain training games,
00:20:26.780 computer games, doing crossword puzzles, Sudoku. But in fact, there's virtually no evidence that
00:20:33.400 those things work. If you do crossword puzzles, you simply get better at doing crossword puzzles.
00:20:39.780 Now, there is a small amount of evidence that doing crosswords or other word games
00:20:45.880 help keep your word fluency going. But again, the evidence is thin. In fact, Lumosity, one of the big
00:20:55.300 purveyors of brain training games, lost a case with the Federal Trade Commission and had to pay a huge fine.
00:21:02.200 So there have been a lot of lawsuits over false claims here. There's big money to be made.
00:21:09.200 Everybody wants a quick fix. Buy a $10 app for your phone and improve your memory. Take ginkgo
00:21:16.440 and or ginseng. No, no evidence. Now, to be fair, as a scientist, the fact that there's no evidence
00:21:24.120 doesn't mean they don't work. It just means we don't have any evidence they do, and you can decide
00:21:30.260 accordingly for yourself. But the things that we do have evidence for are two things, and we've sort
00:21:36.800 of brushed up against one of them. One way to keep your memory better is to keep your social circles
00:21:42.880 active and interact with new people. The reason for that is that interacting with others is about the
00:21:50.520 most complex human activity we can do. It's more complex than brain surgery, than being a rocket
00:21:56.960 scientist, than solving Sudoku or crossword puzzles, interacting in a meaningful way with real live
00:22:03.960 people, not necessarily over the phone or Skype. Sorry, technology. That's demanding, and that keeps the
00:22:12.020 brain active. And the second thing that keeps the brain active is physical movement, not necessarily
00:22:20.380 exercise, which is the imprisoned corollary of movement, but physical movement, stretching,
00:22:27.420 resistance training, walking, especially in nature, in natural landscapes that are perceptually and
00:22:35.160 physically novel and to a degree a little bit challenging.
00:22:39.900 So yeah, we can dig deeper into those two things, the benefits of social relationship
00:22:44.540 and exercise. Going back to our common narrative of getting older, we typically think as you get
00:22:50.820 older, you get lonelier because maybe you've narrowed down the number of friends you have,
00:22:56.160 or maybe your friends or family members are dying. I remember my grandfather, he lived to be 101.
00:23:01.720 And it was sad. As he got older, I remember he told my mother, he's like, all my friends are dead.
00:23:06.840 And it was really sad. I mean, he had family nearby, but it was that it was really sad for
00:23:11.800 him. So what can older people do to prevent that from happening where they get to the point where
00:23:18.320 they have no friends? Well, that is a hazard. I met with George Schultz, the former Secretary of
00:23:25.300 State, not long ago. He's 99 now. And he was complaining of the same thing. Most of his friends
00:23:32.720 are dead. Certainly his close friends are dead. I met him about 35 years ago through, I was working
00:23:39.380 for one of his close friends, Edmund Littlefield. And when he lost Ed and other people who were close
00:23:47.700 to him, it caused a downturn. Fortunately, he maintains an active social life. After his wife died,
00:23:56.060 he happened to marry a younger woman who has a circle of friends who were younger than he. And
00:24:01.880 older women have been known to marry younger men. But it's not just that. It's going to church or to
00:24:11.280 civic groups or volunteering with the Red Cross or at a hospital or with Head Start,
00:24:17.280 putting yourself in situations where you are meeting new people.
00:24:20.620 And you highlight there's movements within different cities or communities where they're
00:24:26.720 actually finding ways to get older people to interact with younger people. So there's, I mean,
00:24:32.080 there's instances where there's like co-living. So you have like 20-year-olds living with older people
00:24:37.200 in a sort of community. And it helps the old people because they have people to talk to and interact
00:24:42.360 with and they're new and young. And the younger people benefit from that because they get to hang out
00:24:47.420 these old people who have all this vast experience of life.
00:24:50.880 Well, thank you for reminding me of that. And I love this. So in some cities where there are
00:24:55.400 universities and colleges, and this happened out of necessity, dorm rooms got crowded and the
00:25:01.700 university didn't have space. So living communities have popped up where college students live with
00:25:07.840 older adults and everybody loves it. I think in a number of cases, the college students went into it
00:25:13.680 thinking it would be depressing, but they love it. They love the warmth, the love they get from the
00:25:19.500 older people. It helps them to reevaluate what old age means. The older people are having companions
00:25:26.460 who are full of energy and optimism and are learning new things. So these age-mixed living groups are one.
00:25:35.240 Some communities have started intergenerational choirs where young people and old teachers sing together,
00:25:41.360 which is a great bonding activity. When I was a student, you're asking me why I wrote the book.
00:25:49.360 I had a number of extraordinary and just plain dumb lucky experiences where my entire life I found myself
00:25:58.320 interacting with people who were in their 80s and 90s. It just happened that way. When I was a kid,
00:26:05.480 I grew up in a small rural Northern California town, unincorporated town, mostly agricultural and
00:26:13.180 ranchers. And we had a post office that was built as part of the Pony Express. And the U.S. Postal Service
00:26:22.980 had named an older woman to be the postmaster, which was kind of a highfalutin title because there was
00:26:29.280 really only one employee in this small post office, but every post office has to have a postmaster. Her name
00:26:35.920 was Eleanor Dickinson and she was 75 when I was a kid. And when I was eight, she'd have me over to her house
00:26:43.840 for cookies and milk and we chatted and I just loved her stories. And she was a naturalist. She taught me about
00:26:52.640 the bugs and the creatures in her garden. And I had a kind of repeat of this when I was an older
00:26:59.460 student in college. One of my favorite professors was John Robinson Pierce, who was a science fiction
00:27:07.180 writer and a great scientist who had launched the first telecommunications satellite in the early
00:27:15.540 1960s, Telstar. And when I met him, he was 80. He was in his fourth career as a
00:27:22.640 professor at Stanford. And he would have people over to dinner parties of all ages, students,
00:27:29.280 older colleagues, middle-aged colleagues. And there was no agenda for the dinner parties. Usually it
00:27:35.200 was just to talk and get to know each other. It was a great thing. And this is another society of
00:27:40.320 interacting with new and different people is another reason why older people might want to try
00:27:44.200 to stay on the job as long as they can, not retire at 60 just because they could. That's absolutely true.
00:27:49.960 I could imagine some people who are in stressful jobs or jobs they hate wanting to change jobs
00:27:56.880 and facing ageism, not being able to find a new job. Sure. But if you look at work in the broadest
00:28:03.900 possible way, retirement really does signal decline statistically in an awful lot of people.
00:28:11.240 Your social circles shrink. You're no longer feeling valued. And so immersing yourself in charitable
00:28:17.480 organizations, political causes, religious organizations, even a book club or doing something
00:28:25.240 that keeps you engaged with a meaningful activity to which you can contribute. That's very, very important.
00:28:32.220 Now, it takes all forms. My wife's grandparents had eight children and I think 60 grandchildren
00:28:43.380 and another 35 great-grandchildren. And it was meaningful for them to do family things. Grandma
00:28:52.600 was writing out birthday cards several times a week just to keep up with that. And they were very
00:28:59.140 thoughtful birthday cards. She kept up with what everybody was doing. That was meaningful to her.
00:29:04.660 I don't presume to tell anybody what's meaningful to them, but it kept her and grandpa alive well
00:29:10.340 into old age, late 80s. So interacting with your social environment, keeping an active social life
00:29:16.000 can not only just stave off things like loneliness and depression that often happen when you don't
00:29:20.400 have a social circle, but as you said, it also keeps your mind sharp, improves memory. So do it for
00:29:26.420 those reasons as well. Then you mentioned another thing that one of the best things we can do to keep
00:29:30.960 our memory sharp and our mind sharp as we get older is exercise. But you said it's not like getting on
00:29:36.520 the treadmill and walking and while you're watching law and order special victims unit. It is, it's
00:29:43.100 interacting out in nature and nature is again, I think the commonality between nature and social
00:29:48.740 relationships is nature is complex. Yeah. And this gets to, this is something that we've only recently
00:29:55.740 begun to appreciate in the neuroscience community. My take on this idea is that the body and the brain
00:30:03.500 co-evolved over many millennia and not just humans, but all mammals and reptiles and fish, any mobile
00:30:13.680 creature had to explore its environment in order to find food, find safety and find a mate. And our brains
00:30:22.740 were basically built for that. And everything got added on in evolutionary fits and starts to support
00:30:31.600 geolocation and geo-navigation. And if we don't do that, if we stop moving around and exploring the
00:30:39.520 environment, those parts of our brain atrophy quickly and they support things that are important
00:30:46.140 for other purposes like memory and, and problem solving. So exercise is good. There's nothing bad about
00:30:55.640 it. In fact, it can be quite helpful for heart health and for oxygenating the blood and, and hence the
00:31:02.640 brain. But if you're focusing mostly on brain health, getting out into the world, into complex natural
00:31:10.440 environments and moving around in them is really important, especially natural trails where anything
00:31:18.240 could happen where there are twigs in your way and roots to trip over and rocks and boulders. And,
00:31:24.940 you know, sure walking around central park or, um, golden gate park on a well paved path is safer and,
00:31:32.720 and a good thing, but even better is to get out, you know, where a bird or a creature might run across
00:31:38.780 your path and take you by surprise. That's what's mentally activating.
00:31:44.840 Sounds like orienteering would be a great hobby to take up.
00:31:47.300 Absolutely.
00:31:48.200 And this, this idea of, uh, of movement and, and navigating being associated with memory,
00:31:52.820 we've had a guest on who wrote a book about that topic, about our navigation's influence on our
00:31:57.380 brain. And one of the sort of the interesting research that's coming out lately is how the
00:32:01.260 reliance on GPS may, it's not definitive yet, but may have detrimental effects on memory as you get
00:32:08.240 older because you rely on the GPS to navigate instead of using your navigational brain. And because
00:32:13.420 your navigational part of your brain's associated with memory, your memory ability sort of atrophies
00:32:18.500 more quickly.
00:32:20.620 Yeah. It's, it's an interesting idea and, you know, science takes a long time. And so we don't have
00:32:27.660 data yet on this. And of course, a lot of things that make intuitive sense didn't pan out,
00:32:32.940 but from what we know about evolution and the way the brain is structured and wired,
00:32:38.000 GPS enables or promotes a kind of complacency where you don't have to build a mental map.
00:32:44.160 And that can't be good because the hippocampus is the seat of memory. At least it's where memories
00:32:50.620 are stored and processed and indexed, if not where they actually reside. And we've known this for 60
00:32:56.600 years. And the hippocampus is essential for memory. If it's damaged, you stop forming new memories.
00:33:02.560 It can become difficult to retrieve old ones. Amnesia typically occurs from some insult to the
00:33:09.600 hippocampus. And the hippocampus evolved for place memory, for navigation. It didn't evolve
00:33:18.220 necessarily for remembering things like the Pledge of Allegiance or Rime of the Ancient Mariner or lyrics
00:33:26.300 to your favorite song. It evolved to help you navigate and find places and remember where the well and the
00:33:32.060 fruit trees are. And the way it's built functionally, anatomically, is that if you're not navigating or
00:33:39.660 using it for that, the other things can fall by the wayside. So maybe one thing possibly is use your
00:33:46.780 GPS less. It won't hurt, but maybe use that less. So I do that every now and then. I'll just not use
00:33:53.160 my GPS just to get around town for that reason. Plus, it's just more fun to have to figure out how to
00:33:58.080 get somewhere on the fly. Well, I think purely from a safety standpoint, as somebody who lives in
00:34:04.100 California where earthquakes are a threat and with people who live in Florida and other hurricane
00:34:11.100 places, at some point the GPS system could go down and you may need to leave. That's happened. In fact,
00:34:18.340 we had a little glitch here in Los Angeles a couple of days ago where the GPS went down for 20 minutes
00:34:23.860 and I had to get across town. Now, I, like many people, often use it if I'm in a hurry
00:34:30.620 because I want to find the fastest route. It is important to know the general lay of your community,
00:34:39.540 the general routes out and main thoroughfares and some alternate routes in case those thoroughfares
00:34:46.800 are clogged, not just for brain health, although it is good for that, but, you know, for the emergency
00:34:54.420 preparedness. If, if the system goes down and someday it will, you need to be able to navigate.
00:35:00.520 So the last thing I'd like to talk about, about our aging brain and how it changes as we get older
00:35:05.120 is our emotions. And again, going to this narrative that we have of what aging looks like, when we think
00:35:10.140 of emotions in older people, we think of the, you know, the old person with the sour face, who's
00:35:15.520 crotchety and angry and yelling, get off my yard. And, but your research highlights that actually
00:35:21.120 older people are some of the happiest people out there. They are. Yeah. What's going on there?
00:35:26.700 And, and, and not every older person, there are some crotchety, grouchy, cantankerous old people,
00:35:33.580 but statistically older adults are happier. In fact, across 60 different countries, six zero different
00:35:40.040 countries, the peak age of happiness occurs around 82. Wow. Some of it is that positivity, positivity
00:35:47.980 bias. Old people tend to encode and remember more positive experiences. And some of it is really
00:35:57.100 an appreciation that, you know, if you've made it to old age, things have worked out for you.
00:36:03.580 Even if you didn't like yourself when you were younger, or you were self-conscious that other people
00:36:09.240 didn't like you, the most part, you made it. You, you, you're okay. Uh, you know, might've wanted to
00:36:16.980 be a different person, but this person worked out all right. And whatever accomplishments you've had,
00:36:22.460 you can appreciate most of us, although gratitude is something we can all work on. And that also helps,
00:36:29.180 but we, we do have a kind of neural, a neuro emotional mechanism that kicks in where we
00:36:35.900 appreciate things more. We appreciate things more. We experience more gratitude. And some of that gets
00:36:40.760 back to, some of that gets back to Laura Carstensen's idea that with a limited amount of time,
00:36:47.300 you stop and you smell the roses. You, you want to just sit and enjoy what you have and appreciate it.
00:36:55.860 You're not fighting the treadmill. You're not constantly trying to climb the ladder. You're allowing
00:37:02.520 yourself to appreciate what you have rather than what you don't. And what's interesting about that
00:37:06.980 research about emotions over the life cycle is that it, it kind of bottoms out at age 50. I guess
00:37:12.680 that's the point in your life where like, you've probably reached where you are and you're going
00:37:16.360 to be in your career likely. And so you kind of have that, you're like, okay, this is it. But then
00:37:20.760 after a while, as you get older, you're like, well, it's actually pretty good. I've done pretty well for
00:37:24.840 myself. Well, Daniel, this has been a great conversation. Where can people go to learn more about
00:37:28.880 the book and your work? Ah, danielleviton.org, D-A-N-I-E-L-L-E-V, like Victor, I-T, like Tango,
00:37:40.320 I-N, like November, all run together, danielleviton.org. And the book should be available wherever books
00:37:47.200 are sold. Well, Daniel Leviton, thanks so much for your time. It's been a pleasure. Thank you, Brett.
00:37:51.780 My guest here is Daniel Leviton. He's the author of the book, Successful Aging. It's available on
00:37:56.020 amazon.com and bookstores everywhere. You can find out more information about his work and his book
00:38:00.020 at his website, danielleviton.com. Also check out our show notes at aom.is slash Successful Aging,
00:38:06.080 where you can find links to resources, read all deeper into this topic.
00:38:15.860 Well, that wraps up another edition of the AOM Podcast. Check out our website at
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