There is a positive relationship between: 1) early day sunlight viewing and earlier bed times, and better sleep
The evidence is convergent. Multiple independent sources reach the same conclusion, the underlying mechanism is well-characterized, and even the field's most cautious voices treat it as worth doing.
There is a positive relationship between: 1) early day sunlight viewing and earlier bed times, and better sleep
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Morning sunlight viewing. To set circadian rhythm, focus, mood etc.
Exposing your eyes to sunlight in the morning increases daytime energy & mood etc. & improves nighttime sleep
Viewing morning sunlight for 5-20 min (blinking allowed) especially on overcast days and also, no screens 10pm to 4am. Plenty of data to support the outsized positive effects on mental and physical health (sleep, mood, focus etc).
Aim for sun within 60min of waking. That has a hugely a hugely positive effect on mood, sleep, and more.
The reason the “view morning sunlight” thing works to positively impact energy, nighttime sleep, etc. is because your circadian biology is among the more powerful systemic control points for mental and physical states.
Yellow blue contrast is the optimal signal, but that happens naturally when the sun is low in the sky, but even if it’s cloudy, you’re doing yourself a service by getting sunlight in your eyes.
It provides an outsized positive impact on for your wake-sleep cycles, mental health, and physical health.
The point is that humanity NEEDS early sunlight to biologically function properly
Get sunlight in your eyes as early in your day as possible.
Morning & evening sunlight viewing is going to be the best “improve daytime wakefulness & night time sleep” for the time spent (~5-20min & you can do other things during).
Sunlight to eyes (morning) = increased daytime alertness/focus, better sleep, immune function.
1) View bright light (ideally sunlight) in the am for 10-30 min.
10,000(+) Lux light in the first 60min of your day (ideally by sunlight viewing or, if sun not accessible by using a 10K light)
The diabolical twist in the wiring of your circadian visual system is that it takes a lot of photons, ideally from sunlight, early and throughout the day to elevate your mood, focus and alertness
Viewing morning sunlight is a powerful lever to organize all that.
Once you start viewing sunlight in the morning on a regular basis, you not only start to sleep better, you also feel more alert and focused at regular times of day.
I’m officially replacing the word “sunlight” with “daylight” so that when I say to “get sunlight in your eyes in the morning as soon as possible after waking”, it’s clear that means every day & even/especially on overcast days.
Viewing morning sunlight, even with cloud cover, sets all the other key steps in motion.
Morning sun is the anchor for everything. People dramatically underestimate this. Not just for sleep but daytime mood, immune system function, etc. you need your circadian biology set right and that’s the way to do it.
Maximize morning sunlight viewing.
Getting outside sans sunglasses in the morning is powerful for mood, alertness, sleep & metabolism.
1.Sunlight exposure w/in 30m of waking for 10-30m
Viewing light early in the day, ideally sunlight, is key for establishing healthy sleep-wake rhythms and for allowing you to fall asleep easily at night. Now, it's not gonna make sure that all that happens every single time, but it is the foundation of proper sleep and what we call circadian health, it governs metabolism and so many other things that are supposed to exist on a regular 24-hour cycle.
the best way to stimulate that increase in cortisol at the appropriate time is that very soon after waking within 30 minutes or so after waking, get outside view some sunlight, even if it's overcast, get outside view some sunlight, no sunglasses. Never look at any light so bright that it could damage your eyes, but do that for two to 10 minutes.
I'm a absolute, almost rabid proponent of people getting morning sunlight in their eyes as the fundamental layer of setting their circadian rhythms and sleep and health as a zero-cost practice, that believe it or not, can be done any time of year, or anywhere.
Fundamentally speaking, get that morning sunlight viewing. I promise you will be grateful that you did. It makes everybody feel better, feel more alert, and it will greatly assist with your ability to fall and stay asleep later that night.
viewing morning sunlight increases cortisol early in the day which is excellent because you want cortisol elevated early in the day and you want it lower later in the day and because of the relationship between the cells in your eye that sense sunlight specifically morning sunlight believe it or not that happens and signal to your hypothalamus and the relationship between the hypothalamus and the pituitary and other endocrine organs it sets in motion a dopamine-related Cascade in neuromodulators dopamine and hormones that lead to states of well-being elevated mood alertness Etc throughout the day it also helps your sleep at night but today we're talking about dopamine so yes believe it or not that morning sunlight exposure does increase your levels of dopamine not just cortisol
try to view sunlight that is with your eyes view sunlight as early as possible after waking whenever I say that the most common question I get is what do I do if I wake up before the sun comes out well unless you have superpowers that I'm not aware of you can't make the sun come out any earlier so just flip on artificial lights as needed until the sun comes out and then get outside face East in the morning take off those sunglasses it's perfectly safe to look at low solar angle sunlight without sunglasses providing you're not you know driving into bright light and you crash this kind of thing get outside look at the sunlight definitely blink to protect your eyes as needed but get that sunlight in your eyes early in the day this has Myriad positive effects on mood focus and alertness and nighttime sleep later that night and it does so through a number of well-defined biological and endocrine hormonal Pathways that I've discussed on many previous podcast episodes and you want to do this for about 10 minutes on non- overcast days and as long as 20 or 30 minutes on overcast days
Morning catecholamine release. So dopamine, epinephrine, and norepinephrine. And those act in synergy to create more early day and daytime mood focus and alertness and enhance the transition to nighttime sleep.
sun exposure especially early day sun exposure when the sun is low in the sky to set your circadian rhythm and late day sun exposure okay I'm not talking about middle of the day getting baked in the Sun and you know sunburned or things of that sort but around the time of sunset especially sun exposure to the eyes is powerfully modulating your circadian rhythm to elevate daytime mood focus and alertness and improv sleep
I'm a big believer in getting sun exposure to the eyes early in the day blinking as needed to protect the eyes of course but in order to set one's circadian rhythm for elevated daytime mood focus and alertness and improv nighttime sleep there's just so much data to support setting one's circadian rhythm properly ly for sake of health and there's so much data to support the fact that sunlight viewing in particular is the best way to do that and sunlight viewing in the early part of the day in particular is the best way to do that
This practice will improve mood, focus, and alertness and set a timer for your nighttime sleep.
And if you have that exposure for half an hour to an hour in the morning, then that's pretty good enough to again put a strong brake on melatonin, which might be slowly going down in the morning. And at the same time, that melanopsin receptor, it does slightly different things during daytime. It sends a signal to the brain to increase alertness and make us more functional, so it reduces depression and makes us more happy.
10 minutes of bright outdoor light within the first hour of waking anchors the circadian phase and improves sleep onset that night.
Morning sunlight exposure shifts the cortisol awakening response forward, improving daytime alertness.
Long-term morning sunlight reduces age-related macular degeneration risk.
Sleep regularity predicts all-cause mortality more strongly than sleep duration.
Tracking deep sleep on a wearable accurately reflects EEG-measured slow-wave sleep.
Caffeine has a half-life long enough that consumption after 2pm measurably degrades deep sleep in slow metabolizers.