2020-04-12 08:53

Happily, except for playgrounds, outdoor public spaces are still open where I live.

The outdoors and sunshine are such strong factors in fighting viral infections that a 2009 study of the extraordinary success of outdoor hospitals during the 1918 influenza epidemic suggested that during the next pandemic (I guess this one!) we should encourage “the public to spend as much time outdoors as possible,” as a public-health measure.

Source: Closing the Parks Is Ineffective Pandemic Theater – The Atlantic

Non-deadly, yet perhaps actinic rays

Sun shining through a lily flower.

I went for a long-for-me, 7.22-mile run this morning, and listened to a podcast about light therapy.

(I go back and forth on listening to podcasts during runs. When I listen I feel like I miss out on being fully embodied in my physical activity. When I don’t listen I fall behind on stuff I really want to listen to. Today I listened.)

The podcast had Paleo Magazineʼs Ashleigh Van Houten interviewing Scott Nelson, the founder of Joovv, talking about the health benefits of exposing your skin to red and near-infrared light. I’d heard about this, but had assumed it was some woo-woo new-agey thing. Turns out it’s probably not. There’s been a huge amount of research on the benefits of exposing your skin to red light in the 660-nanometer and near-infrared light in 850-nanometer range.

(There was apparently a lot of research funded by NASA back in the 1990s when they had to use lasers to get light of just the right frequency. Nowadays LEDs make it easy to get the intensity and frequency of light that you want.)

So, I’m out on my run, listening to Ashleigh and Scott talk about all the health benefits to your skin (of the red light) and to deeper connective tissues (of the near-infrared) and thinking that it all sounds really cool, but knowing that I’m probably never going to want to spend even hundreds, let alone thousands, of dollars to buy a device that will shine bright red light on my skin.

At around the mid-point, maybe 4 miles into my run, I paused for a drink of water out of the fountain in Morrissey Park, thinking it was pretty hot for just 8:40 AM . Which made me think of this giant glowing orb in the sky, which was shining down on me with pretty intense light at a wide range of frequencies, most definitely including red and near-infrared.

Turns out, sure enough—the energy in the red and near-infrared frequencies of sunlight is right in the range of therapeutic doses shown to have health benefits.

Of course, full sunlight is full of other frequencies of light, including blue (prone to mess up your circadian rhythm if you’re exposed too close to bedtime, but just what you want to get your circadian rhythm set correctly if you get your exposure in the early morning like I was doing), and ultraviolet (dangerous in excess, but the UV index was zero when I started my run at 7:40 AM and probably didn’t reach 5 before I was safely back indoors). So you need to treat sunlight with respect. But I already knew that.

I have mentioned before that I feel better when I spend a lot of time outdoors, and have speculated that sun exposure is part of the reason. (Along with time in nature, moving more, appropriate quantities of community and solitude, etc.) The information about red and near-infrared light exposure seems to lean a bit in the sunlight direction—but with the welcome news that it’s not just the vitamin D that helps make me feel better, which means maybe I can feel great without having to expose myself so much to the deadly actinic rays of the sun.

Maybe there are non-deadly actinic rays!

Nature pyramid!

Via The Art of Manliness I found this great graphic of a nature pyramid (à la the food pyramid) at the Nature Kids Institute. It’s aimed at kids, but really the prescription for adults should be exactly the same.

It’s tougher in the winter, of course—when the grass is snow-covered and the paths are icy, they simply aren’t so runable or walkable. But that’s okay. It’s still worth getting outside.

It’s also tougher in Illinois to find wilderness than in most other places I’ve lived. There was real wilderness in Michigan and Indiana and Florida (although when I lived in Florida I did a pretty poor job of spending time in it), and of course vast amounts of real wilderness in Utah and California. Still, there are places in Champaign county where I can at least get out of sight and out of earshot of roads, even if it isn’t really free of human influence.

Anyway, these quantities seem like good initial target minimums for time in nature. Maybe not optimal, but adequate, and probably a lot better than most people manage.