10+ hours of podcasts, in 5 minutes.
10 quotes from 1 episode on Hidden Brain, each with a timestamped link to the source.
Chris Barnes details how chronic sleep debt and disrupted circadian rhythms cause severe industrial accidents. The loss of just one hour for Daylight Saving Time drives a 5.6% spike in mining injuries the following Monday.
Many employees hold the false belief that they can thrive on just 4 hours of sleep without any drop in performance.
“Unfortunately, a large number of people believe they are short sleep superheroes and that maybe it's fine for everyone else to get 8 hours of sleep, but I'll be just totally fine if I get 4 hours of sleep because I'm somehow above the need for sleep. It's an unfortunately common belief.”
Male employees who brag about missing sleep gain social status because their colleagues view them as physically stronger.
“What I find especially interesting is there's a gender wrinkle here where the strength path is most visible for men…”
Operating out of sync with natural circadian rhythms damages daytime alertness and makes nighttime recovery far more difficult.
“When we have such circadian misalignment, not only are we less alert and less effective when we are trying to do waking activity, but our sleep then becomes much more challenging as well…”
Events at Chernobyl and Three Mile Island struck between 1:30 AM and 4:00 AM, a period of biological vulnerability. Other catastrophic errors follow extreme schedules, such as employees working 12-hour shifts for a month straight.
“So both Chernobyl and Three Mile Island, these events happened between 1:30 in the morning and 4:00 in the morning…”
“When they later investigated what happened, one of the potential causal factors was about a month straight of 12-hour shifts for the employees who were involved. So this was a tremendous accumulation of sleep debt from missed sleep over this time period.”
A 25-year study of 500,000 mining incidents reveals a 5.6% increase in injuries the Monday after clocks spring forward. Human health and safety outcomes improve under permanent standard time.
“We examined about 1/2 a million mining injuries over a 25-year period and, surprisingly, we found a spike on the Monday right after the change to Daylight Saving Time of 5.6% in mining injuries and an even larger spike in injury severity as operationalized by number of lost workdays due to the incident…”
“There's a large body of research to indicate that we are generally going to be healthier and have better outcomes when we have permanent standard time…”
Workers brag about sleep deprivation to project strength and self-sacrifice. Men who boast about exhaustion are perceived as strong, while women earn status only by appearing to sacrifice themselves.
“…that bragging about your sleep deprivation can increase perceptions of your strength, which in turn increases perception of your status. The other path is self-sacrifice.”
“And it's the opposite for women, where they tend to be seen as self-sacrificing and gain status that way, but they're not perceived as stronger for bragging about their sleep deprivation…”
“So, my colleagues and I actually conducted some research about people bragging about their sleep. And our question was essentially, given all the evidence that we have so far that sleep deprivation has such bad effects on work, why would people do this?”
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