There are five key practices to harness the tremendous benefits of the sun:
Go outside as soon as possible after waking up to expose your eyes to the high levels of blue light from the sun.
Get adequate Mid-Day Sun exposure on as much skin as possible to optimize Vitamin D production.
Do NOT let your skin get burned so consider your skin type and start with low exposures to mid-day sun (5 minutes) and gradually increase time. For an excellent guide to sun exposure based on skin type and your location click here to this previous blogpost: https://workoutanytime.blogspot.com/2022/05/the-facts-on-safe-sun-exposure-and.html
Get adequate morning and late afternoon sun exposure to expose your body, eyes and brain to the highest levels of Near Infrared Rays from the Sun.
Minimize light exposure and particularly blue light exposure in the evening
Waking Sun Exposure and Circadian Rhythm and Sleep Quality
Many people are aware that evening and night light exposure can really hurt your sleep. However, what most people do not know is that early morning sunlight/blue light exposure is just as important to setting your body’s circadian rhythm and getting a good night’s sleep!
Human beings have been on the earth for hundreds of thousands of years and until very recently we got early morning sun exposure every single day as soon as we woke up. The sun emits high quantities of blue light.
The key to setting our daily rhythm is high levels of bright blue light in the morning and low to no levels of blue light in the evening and before bed!
Indoor lights do not pack nearly the punch of outdoor sunlight – even on an overcast day. Brightness levels are measured in “lux”, and on a bright sunny day the outdoor lux levels are over 100,000 lux! You may also see the term “lumens”, and 1 lux = 1 lumen per square meter so they can be used somewhat interchangeably. Even on a very overcast day outdoor light levels are close to 2,000 lux. In contrast - the average well-lit home indoor lux levels are somewhere between 100 – 500 lux so MUCH lower than outdoor sunlight!
Even 5 minutes of exposure to morning sunlight on a bright day is sufficient to help your sleep and energize you in the morning! On overcast days try to get 10 – 15 minutes of outdoor light – you can have your coffee outside!
During winter months it is well worth considering purchasing a high lux light – needs to be at least 10,000 lux to be effective and there should be zero UV light emitted. Here is an excellent unit: https://www.amazon.com/Carex-Day-Light-Classic-Bright-Therapy/dp/B00PCN4UVU/ref=psdc_13053141_t4_B078KFCN1N
Sunlight and Vitamin D
Vitamin D is produced by the UVB rays emitted by the Sun and these levels are highest during mid-day sun and depending on your skin type, time of year and where you live you need to spend anywhere from 5 – 30 minutes with plenty of your skin exposed to achieve the Vitamin D boosting effects. To learn more about this check out this previous blog post on safe and effective sun exposure: http://workoutanytime.blogspot.com/2022/05/the-facts-on-safe-sun-exposure-and.html
Morning and Late Afternoon Sun Exposure
Another important portion of the Sun’s Spectrum is infrared and near infrared light (NIR) which we experience as heat. In particular near infrared light has been proven to provide tremendous health boosting effects. Fortunately – the near infrared portion of the sun’s rays makes up 40% of the output and near infrared is highest in the morning and late afternoon.
Whenever you feel heat from the sun you know you are getting infrared and near infrared exposure and unlike UV light near infrared cannot damage skin and goes through single layers of clothing easily. In fact, near infrared can actually penetrate through the skull into the upper meninges of the brain with some big benefits!
Benefits of Near Infrared Exposure
There are big benefits to Near Infrared because NIR directly stimulates increased energy production from the mitochondria in our cells which are responsible for almost all the energy in our bodies.
As the mitochondria increase energy output they also generate melatonin! Melatonin is not just important for stimulating our sleep cycle – it has many other powerful benefits.
Melatonin has been shown to have antioxidant and anticancer effects, to play a role in the regulation of blood pressure and glucose levels, is highly anti-inflammatory, and has also been shown to lower the risk of SARS-CoV-2 infection and mortality.
Melatonin exists in two main forms within the body – circulatory melatonin, which is produced by the pineal gland and has its major effect on sleep and the circadian rhythm, and subcellular melatonin, which is produced and used locally by the mitochondria within our cells.
Sunshine is our major source of infrared and NIR light, but it can also come from exposure to fire (campfire, candle flames, fireplace, etc.) and certain types of light bulbs. Here is a great video showing exactly how this production of melatonin produces its many benefits: https://youtu.be/sNklS0lzlgA
Near Infrared Maximized by Plants
While direct sunlight exposure is great – you can actually magnify near infrared exposure by walking in and around plants! Green leaves strongly reflect NIR – checkout this NIR camera photo to appreciate just how much NIR plants can give off: http://www.idahoairships.com/idaho-airships-envira-nir-gallery-working-2_19-31/
NIR in Winter
To get the benefits of NIR during winter months you can use a infrared/near infrared sauna or use a high quality Near Infrared Bulb. Here is an excellent example: https://www.amazon.com/TheraBulb-NIR-Near-Infrared-Bulb/dp/B01855YCXM
Minimizing Blue Light Exposure at Night
During the evening and night-time hours it is critical to reduce overall light exposure and specifically blue light exposure to allow the Pineal Gland to release melatonin.
Here are some key steps you can take to minimize blue light at night:
Reduce the light levels in your home by using dimmers or just turning off lights.
Minimize your exposure to TV – particularly in the hour before going to sleep.
Minimize use of your phone and computer
Install a redlight filter like the free Twilight App for your phone and the free flux program on your laptop to reduce blue light output based on time of day so that during evening and night hours you get less blue light exposure!
Replace regular night lights and bedroom bulbs with redlight bulbs – true redlight does NOT interfere with sleep or melatonin release they way Blue Light does. In addition, it does not interrupt night vision. Here is a great product that you can also travel with: https://shoptruelight.com/product/truelight-luna-red-portable-nightlight/
You can also try blue light blocking glasses which are available on Amazon.
Keep your room as dark as possible when sleeping and/or consider buying a comfortable pair of sleeping mask which blocks all light.
Take Home Message
Sun exposure is part of our evolutionary heritage and you NEED regular sunlight optimize your health and wellness. To see an excellent in depth review of the research on the concepts mentioned in this blogpost click here: https://youtu.be/5YV_iKnzDRg