It’s that time of year
again – time to fall back and set our clocks back one hour. . Unfortunately, your body clock is not
nearly as easy to reprogram. This
comes with some serious health consequences.
An hour time shift does not seem like a lot, but your body runs on a
tight schedule and this one-hour change throws us off.
Scientists have
documented that the shift to daylight saving time in the spring, when we lose
an hour of sleep, is linked to an a much higher rate of attacks and car
accidents. Although we gain an hour to
sleep – the change throws off the sleep cycle and that is where all the
problems come from.
Over the last 20
years, scientists have documented that, in addition to the master clock in our
brains, every cell in our body has a circadian rhythm and time-keeping
mechanism. The body and cell’s circadian rhythm help regulate important
functions such as sleep and metabolism. And increasingly, there's evidence that
when our habits — such as when we eat and sleep — are out of sync with our
internal clocks, it can harm us.
When we disrupt our
routines with erratic sleep or eating habits, it can increase the risk of
metabolic disease. For instance, overnight shift workers are at much higher
risk of developing diabetes and obesity. Research also shows that kids who
don't have set bedtimes and mealtimes are also more likely to become
overweight.
As days get shorter
with less daylight, it's easy to fall into bad habits, and light exposure is
key to regulating circadian rhythm.
It is the primary signal to turn on the body’s metabolic processes for
sleep and rest to active and alert.
How to prepare for the
dark days
1. Go to bed an hour or so earlier
and get up 8 hours later.
Maximize
your exposure to daylight in the morning hours since it gets dark so early in
the evening.
2. Minimize Nighttime light
Exposure to light and
electromagnetic fields from computers, phones, tablets, and T.V.’s all act as a
stimulant, so it is important to minimize nighttime light exposure and blue
light exposure in particular. Blue light
comes from artificial lighting. Blue
wavelengths – which are beneficial during daylight hours because they boost
attention, reaction times, and mood – are disruptive at night. Energy efficient lighting is packed with
blue light as our electronics.
So try to turn off
lights and if you must use a computer get a blue light filtering program that
will adjust the amount of blue light emitted by your computer, phone, and
tablets such as flux – https://justgetflux.com and the Twilight app for your phone. Both allow you to set times and adjust blue
light output of your devices automatically based on time of day! You can also buy blue blocking glasses to use
in the evening. This may seem gimmicky
but there is very well done research supporting the effectiveness of reducing
blue light in the evening through these and other measures!
3. Maximize early daylight Exposure
Just as darkness is the stimulus for sleep - bright outdoor light is what tells our body to wake up! Even on a dark, cloudy day - outdoor light is at least 100 times brighter than indoor lighting! Simply getting outside for 5 minutes as early as possible can make a big difference in sleep quality. The combination of darkness at night and avoiding blue light along with getting out in the sun as early as possible can reset your daily circadian rhythm quickly.
