Today is the last day this season that sunrise is after 7:00 AM.
Some time in October every year I quit being able to get enough sun to make my own vitamin D. Eventually it gets too chilly to go out with enough skin exposed, and even if it stays warm late into the fall, eventually the implacable reality of the earth’s axial tilt means there simply aren’t enough minutes of the day when the appropriate frequencies of UV light shine down where I live.
As a practical matter, this period runs about six months. By early March there’s probably enough UV available, but it’s usually early April before the stars align such that we can take full advantage. We need days when it gets warm fairly early, because the UV is only available for a few hours right around solar noon. (Warmth at 3:00 PM is great, but doesn’t help with the UV until later in the year when the sun is even higher.) We need to get at least two or three of those days each week. (Just two days would probably be enough, if one never had schedule conflicts that kept one out of the sun around solar noon.)
My experience has been this all works out to mean that I need to rely on supplements for my vitamin D needs for right around 180 days per year. With that in mind, I’ve taken to buying two 90-pill bottles of vitamin D each fall.
When I notice—as I say, usually sometime in October—that it has been several days since I managed to get enough sun, I start taking the pills.
Just a few days ago, I finished my first bottle and opened my second.
That means I’ve made it halfway through! Another 85 or 87 days and I’ll be done with the pills and able to make my own vitamin D!
The last few years I was taking 1000 IU pills. This year I upped it to 2000 IU each day. (Not quite as big a change it sounds—I used to eat a lot of children’s breakfast cereals, often supplemented with vitamin D, but since I went low-carb I’m eating a lot less of those.)
It’s still a somewhat higher dose, which I think may be helping. So far this year I’ve only had a couple of days when I found myself glum for no good reason, a bit better than average, I think.
Steven always warns me against imagining that spring starts before April. But soon—less than 90 days now—I’ll once again be able to make my own vitamin D.
I’d been feeling somewhat glum these past two days, so I decided to take steps. Specifically, I paid a visit to the Conservatory at the Plant Sciences Laboratory at the University of Illinois.
I’d been meaning to go since before Christmas, but the University’s closure over the holidays made it seem simpler to just wait, and then my glumness made it seem suddenly rather urgent, so today I just dropped everything to go for a short visit.
Longer term, I want to return for a more deliberate visit. I want to return on a sunny day, and see what some bright sunshine does to the space. I want to bring art supplies and spend some time drawing, rather than merely taking a few quick snaps the way I did today.
In the meantime, enjoy these pictures and imagine that you’re someplace warm and humid and filled with tropical plants.
Today is the last day this season that sunrise (where I live) is later than 7:15:00 AM.
Last night the Urbana Park District hosted a winter solstice night hike at Meadowbrook Park, and Jackie and I had a great time walking with Savannah, the park district guide, and the nearly a dozen people who attended.
The winter solstice is always a hard day for me. The longest night should be the day things finally start to get better, but I have trouble finding solace in that truth. Making a bit of a ceremony of the solstice helps.
In years past—pretty much without even thinking about it—I have always fought against the gathering dark. My reaction to this tweet by Jonathan Mead is a good example.
The more you resist the seasons the more you’ll pay later. Sink into the darkness. There’s no better time than now to fully recharge.
I was having none of it:
“Good advice,” I say, vowing never to give in. I’ll gladly pay more later, when the light has returned. A lot more.
That particular reaction—so automatic, and so strong—prompted some thinking over the past year. Maybe there was something to the idea. Could it be that there’s a way to concede to the dark and cold without sinking into depression?
This winter I will experiment with that idea. I mean, it’s going to be cold and dark whether I rail against it or not. Maybe a bit of acceptance could help?
Savannah read a short text that advocated along these lines—something about “being where you are” on the winter solstice. [Updated 28 December 2016: I had emailed Savannah a link to this post, and she replied with the link to the text she had read from: Winter Solstice Traditions: Rituals for a Simple Celebration]
I’ll post more on this as winter progresses.
The night did not fully cooperate. The sky was overcast, which meant that we couldn’t see much in the way of planets or constellations. We didn’t hear any owls, despite Savannah’s best efforts to call to them, nor did we hear any coyotes. It wasn’t even as dark as it might have been—the low clouds caught and reflected the light pollution from Urbana and campus.
None of which meant the walk fell short of my hopes. Savannah talked about the history of Meadowbrook Park, and showed us several of their current projects—restoring native plants along Douglas Creek (Jackie helped with that one) and opening up some space along the Hickman Wildflower Walk. She talked about the Barred Owls in the woods to the west and the Great Horned Owls in the woods to the east. She talked about the few local species that hibernate, and compared them to the local species that instead engaged in winter sleeping. She took us to the Freyfogle Prairie Overlook and told us it was the highest point in the park—an amusing notion in a place so flat.
It was wonderful.
It was dark enough that I didn’t want to try to take pictures, so the pictures on this post are from earlier visits to Meadowbrook Park. The rabbit in the picture at the top is one of my favorite sculptures. This picture at the bottom, taken on one of our very long walks leading up to our big Kal-Haven trail hike, is from a spot quite close to the Freyfogle Prairie Overlook.
Even though I’m finding my self-care regimen for seasonal depression pretty adequate these days, I’m always interested in more tools. One thing that caught my attention recently was an interview with Brant Cortright in which he talked about his book The Neurogenesis Diet and Lifestyle.
Cortright has a bunch of interesting things to say, one of which I already knew: that depression is not a disorder of serotonin deficiency. According to him—and this I did not know—the way SSRIs work is by promoting neurogenesis. In the interview he said that depression turns out to be caused by a lack of neurogenesis, as are several other disorders (e.g. Alzheimer’s).
I checked the local libraries for copies of his book without success, but in my searches I happened upon this article: Successful brain aging: plasticity, environmental enrichment, and lifestyle by Francisco Mora, which seems to cover pretty much the same ground.
People are looking very hard at drugs besides SSRIs to promote brain plasticity, but the whole idea sounds problematic to me, so I’m interested in the various non-drug interventions suggested by Cortright and Mora. Fortunately, it seems that neurogenesis is easy to increase, by doing the obvious things we already know about:
- Environmental enrichment
- Calorie restriction
- Aerobic exercise
- Adequate levels of certain nutrients (omega-3s, vitamin E).
I think of my artist dates in particular as environmental enrichment, but of course time spent in nature counts as well. The parkour I do probably counts double, because there’s learning how to execute the moves, but there’s also learning to see the environment as a place where those moves are useful.
My weight loss practices have been substantially motivated by the science around calorie restriction as a way to improve health generally, with additional neurogenesis just one factor.
My experience over the previous 30 years convinced me that approaching calorie restriction in a numerical, analytical fashion—tracking what I ate, estimating the calorie content, aiming for some target X% below maintenance—would be unsuccessful. Instead, I came at it from the other direction: If I’m losing weight, I must be restricting my calories.
The caloric deficit implied by my weight loss over the past five years is just about 100 calories per day. Maintenance for me is probably around 1800 calories per day, so I’ve averaged about 5.5% below. It would probably be more accurate to say that I’ve averaged about 10% below maintenance for about half that time, as I’ve generally lost weight during the summers while maintaining a stable weight through the winters. Either number is well shy of the “20% to 40%” reduction that’s been shown to decrease the rate of aging of the brain, but I rather suspect that the benefit exists even at these lower levels—with the added bonus of being sustainable over a much longer period of time. (I mean, how long can you maintain a 40% deficit below maintenance before you simply waste away?)
According to Mora, aerobic exercise seems to increase neurogenesis by the same chemical pathways as calorie restriction. According to Cortright, it has to be aerobic activity of substantial duration—some twenty minutes or more. In particular, the sort of HIIT workouts so beloved of the paleo/primal folks don’t seem to produce the same effect. That’s fine with me: Humans are much too well-adapted for endurance running for me to buy into the idea that primitive humans didn’t do marathon-distance runs when they needed to. Besides, I enjoy long runs.
Of course, neurogenesis is reduced by the obvious things:
- Neurotoxins (mercury, lead, pesticides, etc.)
- Traumatic brain injuries (concussions, etc.)
- High blood glucose levels
My parents made a considerable effort to keep me and my brother free of neurotoxins, and I have managed to avoid concussions so far. I’m sure I subjected myself to excessive blood glucose levels for years, but I think I’ve got that under control now. I also subjected myself to excessive levels of stress for years, due to the vicious circle of my seasonal depression making me unproductive, my lack of productivity making me stress about losing my job, and the stress no doubt worsening my depression. I’ve got that under control now as well.
Really then, this whole neurogenesis thing doesn’t so much give me new strategies for staving off depression, as provide a conceptual framework for organizing the strategies I’m already using.
Even just that seems worthwhile.
(The image at the top is of these great doors at the Environmental Education Center at Kennekuk County Park. The branching trees reminded me of neurons, a little.)
I do a lot of things to stave off winter depression. I walk. I spend time in nature. I spend time walking in nature. I move in other ways—taiji, lifting, stretching, running, parkour. I use my HappyLight™. I take vitamin D. But probably most important is finding things to take delight in.
Jackie doesn’t suffer with the dark days of winter the way I do, which is probably a matter of brain chemistry, but perhaps another factor is that she is very good at taking delight in winter as an opportunity to wear her woollies.
I’m trying to do the same.
It helps that I have new winter clothes, and old winter clothes that fit again. The photo on this page shows me walking in nature, wearing a purple sweater my mom knit for me years ago.
Besides my old sweaters and my new sweaters, I have a smashing wool vest that Jackie gave me, some wool pants that I bought as field pants (but that are perhaps too nice to wear in the field), and a vast collection of scarves that Jackie wove and knit for me. And that’s just the woollies. I also have a nice collection of moleskin and flannel garments perfect for winter, various fleecy things, and a range of jackets and coats to cover all possible temperatures from “slightly brisk” to “well north of the arctic circle.”
This year, I’ll try to take delight in my seasonally appropriate garments, especially the woollies, and see if that won’t carry me through to spring.
The solstice snuck up on me this year. The calendar shows it as being today, which it is if you live east of the United States. But it was actually a few minutes before midnight on the east coast and more than an hour before midnight here.
Happily, Geoff Landis (one of my Clarion instructors) posted a “happy solstice” message on Facebook (with a link to an astronomy site with the details) a few hours before the event, so I was able to appreciate it prospectively.
The longest night of the year has come and gone. I’m glad that’s over.
Why, in just six weeks, it’ll be Groundhog’s Day! And once that happens, it’ll be time start looking for our early spring!
There’s a downside to my plan to hit my movement goal every day in December that I had not considered.
As I discussed a few days ago, I was aware of some of the downsides of using an unbroken streak for motivation—that it can tempt one to continue a streak when doing so would be unhealthy, and that it can be terribly demotivating when it is finally broken.
This is different. It has to do with setting a target that’s a little aggressive, and then making it a minimum.
My current goal, as far as Google Fit is concerned, is 90 minutes of movement. The default was 60 minutes, but I bumped it up right away back when I was manually entering my taiji sessions. They’re typically an hour long, so one class put me over the top; the lower goal didn’t motivate me to move at all.
It’s not a very aggressive goal. Looking back at my history, I generally hit it more than half the time—about 4 days a week. Looking at it on a per-week basis, I do quite a bit better than that, totaling at least 7x my daily goal about 4 weeks out of 5.
Looking at it terms of miles rather than minutes, I walk between 20 and 25 miles almost every week, but I don’t do it by walking 3 miles per day. Rather, I walk 4 or 5 miles three or four times a week, and then one day I take a long walk in the 8–15 mile range. I think it’s healthier to have a mix of short, medium, and long days, and to include an occasional rest day when needed.
And that’s what’s been lacking so far this month. My goal isn’t so aggressive that I’m suffering from the lack of adequate rest days, but it’s aggressive enough that I’ve reduced my scope for including a really long day every week or two.
I suppose Google Fit could accommodate this a programmatically, through something like separate minimum and average goals, but that seems like an unnecessary complication. Probably better to just do what I was doing before this month, and aim to hit the target on average.
I wouldn’t want to continue this unbroken streak forever, but so far it is doing what it was supposed to do: encourage me to get a good amount of movement during the dark days of early winter.
Now that I’ve noticed this issue, I should be sure to get in a long walk soon. If I don’t go overboard, I should be able to take a long walk without needing so much rest that I can’t hit my minimum the next day. And if I can’t, well, the unbroken streak is a motivational tool, not an end in itself.
The photo above was taken at the University of Illinois Conservatory, which was a destination for our walk a couple of days ago. Here’s another, with Jackie.
My friend Chuck likes to point out that we’ve already reached the worst of the winter darkness: Tomorrow the sun will set at 4:27 PM, and that’s as bad as it will get. As early as December 12th the sun won’t set until 4:28, and it just gets better from there.
For people working a regular job, a later sunset is a big deal (although it’s not really a big deal until January 24th, when sunset time is finally after 5:00 PM).
For me, though, it’s sunrise that really matters, and that keeps getting worse for a long while yet. We don’t hit our latest sunrise until December 30th when it’s not until 7:15 AM—and then it just stays there for almost two weeks. Things don’t really start getting better until January 12th, when the sun rises at 7:14.
So really, I should be luxuriating in the relatively early sunrise this morning. The sun will be up at 6:59 AM—before 7:00! Why, it won’t be this good again until February 5th! That’s after Groundhog’s Day!!!
(All these dates and times local to Savoy, Illinois in 2015–2016. Ephemeris data for your location will vary. But if you live in the mid-latitudes of the Northern Hemisphere, they won’t vary by enough.)
This tree, with some sort of little red fruits all covered in ice by a freezing fog, kinda looks sunrise pink. Maybe I could pretend it is the dawn. Of course, before dawn it’s too dark to see it.
Despite my anticipatory angst, I’m actually holding up pretty well so far. I’m sure the extra time spent walking outdoors is helping. Yesterday, I walked to my taiji class, then walked around during the time between the two classes (with Jackie for the first half of her walk home, and then around playing Ingress), and then walked home again after my second class. It was just a little over 6 miles, but my longest walk in a good while. I’m sure the two hours of taiji helped as well.