As it gets darker earlier, and earlier, and earlier....those outdoor enthusiasts who dread treadmills and feeling like a hamster in a cage have to be ok with something I've always struggled with: exercising in the dark. The woods are beautiful under a harvest moon, the eyes of the deer and bears and bobcats (you never know...) in our forested foothills glow wild yet welcoming out of the darkness...if you have a decent headlamp, and decent night-vision.
I am hoping Santa brings me a very, very strong headlamp for Christmas this year because I love running outside in the winter, its just impossible to do sometimes during the daylight as we get closer and closer to the winter solstice. I also bike to work, and the darkness does not stop me there either. Thank you, Thomas Edison.
I have no plans, anytime soon, or ever, to run a 100 mile race. I have joked to my husband though, who is a very strong night runner, that if he found me a 100 miler, in Alaska or Scotland (read: above 64.0000° N, 150.0000° W latitude) during the summer, when it never got dark, I might consider it....
so, in order to keep those eyes sharp while you're looking out for rocks and roots and twists and turns in the trail, or uneven parts or black cats darting across road crossings, here are three recipes using the night-vision super-power granting gourds and starches, pumpkin (again!), butternut squash, and sweet potato (not yams!)
Antioxidants, including beta-carotene, lutein, and zeaxanthin, protect
the macula from sun damage. Get these antioxidants from dark leafy
greens, egg yolks, yellow peppers, pumpkin, sweet potatoes, and carrots.
Notice any color patterns here? Current research shows that consuming
yellow, orange, and green vegetables can help prevent age-related macular
generation, a leading cause of blindness. The macula is a small and highly sensitive part of the retina responsible for detailed central vision. The macula allows us to appreciate detail and perform
tasks that require central vision such as reading.
Without getting way to nerdy, I'd like to explain very briefly why these beautiful, bright orange colored vegetables are 1) orange and 2) why the reason behind their bright autumn pigment is beneficial to our ability to see better in dim light.
Why are they orange? Beta Carotene, part of a family of chemicals (healthy, naturally occuring chemicals) called the Carotenoids, is the molecule which give my favorite fall foods their citrusy, sun-shiny color. Here is the cool part: The long chain of alternating double bonds (conjugated) in Beta Carotene is
responsible for the orange color. The conjugated
chain in carotenoids means that they absorb in the visible region
- green/blue part of the spectrum. So beta-carotene appears orange,
because the red/yellow colors are reflected back to us.
Why do they help us see better in the dark? Beta Carotene is a pre-cursor to Vitamin A. The retinol in Vitamin A is oxidized to its
aldehyde, retinal, which complexes with a molecule in the eye
called opsin. When a photon of light hits the complex, the retinal
changes from the 11-cis form to the all-trans form, initiating
a chain of events which results in the transmission of an impulse
up the optic nerve. So cool!
So, when you eat your pumpkin lasagna or your butternut squash soup, think, gee, this is happening right now, starting in my stomach, going into my blood, and then into my eyes! |
So, a few servings a week of some of these superstars of fall and winter, a good headlamp (carry an extra pair of batteries), and you're good to go on your midnight run in the mountains.
No comments:
Post a Comment