Andrew Huberman· PhD
one night of moderate light exposure during sleep increases nighttime heart rate, decreases heart rate variability, and increases next-morning insulin resistance when compared to sleep in a dimly lit environment.
Loading…
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.
one night of moderate light exposure during sleep increases nighttime heart rate, decreases heart rate variability, and increases next-morning insulin resistance when compared to sleep in a dimly lit environment.
Every Sunday: the week’s new conflicts and verdict changes — and nothing else.
Native comments, Twitter mentions, and Reddit threads about this claim — surfaced together so the conversation isn't fragmented across platforms.
Bookmarking — the dossier-vs-overview split is the right call. Most of the time I want overview; sometimes I want receipts.
Would love a "what would change this verdict" RSS feed. Sign me up if it exists.
The results of this study essentially indicate that even just one night of sleeping the whole night through in a dimly lit environment is disrupting the way that our autonomic nervous system is functioning, altering so called autonomic tone, making us less relaxed is probably the best way to describe it, even though we are asleep, disrupting the way that our cardiometabolic function operates, such that we have lower heart rate variability and increased insulin resistance.
What's incredible about this study is that both rooms were sufficiently dimmed that melatonin levels were not altered in either case.
In healthy adults, even just one night of sleeping in a moderately lit environment, this hundred lux environment, caused changes, increases in nighttime heart rate, which means that the sympathetic nervous system was overly active as compared to people that slept in a completely dark or in a very, very dimly lit room. Decreases in heart rate variability, and here I should point out that heart rate variability or HRV is a good thing, we want heart rate variability. So they saw increases in heart rate, decreases in heart rate variability, and increases in next morning insulin resistance, which is an indication that glucose management is suffering.
the the faint clock in the corner or even a a night light that's too bright yeah could be problematic
They had um people, I think it was kids actually, sleep under a 100 lux overhead light. So, their eyes are closed. 100 lux is very dim. >> And as compared to complete darkness, or it wasn't complete darkness, I think it was a uh like a 1 to 10 lux lighting condition, you saw elevated blood morning glucose.
People that were exposed to 100 lux of light during sleep for one night had higher markers of insulin resistance compared to individuals that were not exposed to light during sleep.
One night of moderate light exposure during sleep increased heart rate & caused insulin resistance the following day in young adults.