https://www.businessinsider.com/daylight-saving-time-is-deadly-2018-3
"The annual ritual in which we "gain" an hour of sleep each November by pushing the clocks backwards may seem like a harmless shift.
But each March, on the Monday after the springtime lurch forward,
hospitals report a 24% spike in heart-attack visits around the US.
Just a coincidence? Probably not. Doctors see an opposite trend in the fall: The day after we turn back the clocks, heart attack visits drop 21% as many people enjoy a little extra pillow time.
"That's how fragile and susceptible your body is to even just one hour of lost sleep," sleep expert Matthew Walker, author of "
How We Sleep," previously told Business Insider.
On Sunday, November 3, instead of the clock turning from 1:59 to 2:00 a.m., it will repeat the hour, ticking back to 1:00 a.m. again. (Shift-workers, worry not:
federal law mandates you will still get paid for that extra hour of moonlit work.) That extra hour of rest may seem like good news this weekend, but over the long haul, the interrupted sleep schedules that result from shifting the clocks back and forth may be bad for our health.
For those of us who will be asleep in bed,
researchers estimate that each spring we deprive ourselves of an extra 40 minutes of sleep because of the change. Our bodies may not fully recover from the shift
for weeks, though the tragic heart attack trend only lasts about a day.
We're also prone to make more deadly mistakes on the roads:
Researchers estimate that car crashes in the US caused by sleepy daylight-saving drivers likely cost 30 extra people their lives over the nine-year period from 2002-2011.
Walker said daylight-saving time, or DST, is a kind of "global experiment" we perform twice a year. And the results show just how sensitive our bodies are to the whims of changing schedules: In the fall the shift is a blessing; in the spring it's a fatal curse.
In addition to the heart-attack trend, which lasts about a day,
researchers estimate that car crashes caused by drivers who were sleepy after clocks changed likely cost an 30 extra people in the US their lives over the nine-year period from 2002 to 2011."
