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Springtime is tired time

Date
Like jet lag ... the body can take several weeks to adjust to increased sunlight.

Like jet lag ... the body can take several weeks to adjust to increased sunlight. Photo: Stock image

The sun is shining, the days are growing longer and the open-air season has begun. It is spring, but not everyone feels energetic. For some, it is a season of leaden limbs and fits of yawning, especially after the switch to daylight saving time.

"Springtime lethargy is a vegetative reaction to the changes in nature," said Angela Schuh, a professor of medical climatology at the University of Munich.

People, like animals, regulate their metabolism and hormone levels in tune with external stimuli such as light and temperature. When it is cold and dark outside, the body protects itself.

"Our core temperature in winter is a few tenths of a degree centigrade lower than in summer. This slows down metabolism" so the body goes into a kind of mini-hibernation, Schuh said.

"During these months, the body produces more of the sleep hormone melatonin," resulting in a pronounced need to sleep.

When spring comes, bringing longer and stronger hours of sunlight, the body must adjust. Body temperature rises, blood vessels dilate, blood pressure sinks. The light causes the body to release more of the "activity hormone" serotonin.

"The body can't manage the adaptation processes overnight, though.

It takes about two or three weeks," said Heidrun Holstein, a physician for the consumer advice centre of the German state of Baden-Wuerttemberg.

Factors other than processes in the vegetative (autonomic) nervous system can contribute to springtime lethargy. Infections are common during changes of season. Large day-night temperature swings put added strain on blood vessels and circulation.

Depending on climatic conditions, springtime lethargy and the switch to daylight saving time may coincide. Personal habits play a role too, such as how one organises one's day.

Springtime lethargy symptoms can vary widely: "Common complaints are tiredness, dizziness, irritability, headaches, mild sensitivity to changes in the weather and a tendency towards a sad mood," said Michael Stimpel, an internist and a professor in the University of Cologne's medical department.

Particularly at risk, he said, are the elderly and frail, women, and people with unstable blood circulation or those who have had very little exercise over the winter.

Those who suffer from springtime lethargy can alleviate their symptoms using simple means.

"You can act preventatively knowing that light stimulates the production of the activity hormone serotonin," Stimpel said. "You can spend a lot of time outdoors or undergo light therapy with special lamps which use filtered light."

Sauna baths, Kneipp hydrotherapy and contrast showers stabilise circulation and steel the vascular system so it is less susceptible to temperature fluctuations. Exercise activates the whole body.

"Eating plenty of fresh fruits and vegetables supplies the body with an extra portion of vitamins and minerals," Holstein said.

Drinking a sufficient amount of fluids was also part of a prevention program, she said. This makes the body fit for spring from the inside out. When springtime lethargy is especially acute, it helps to take a short break and get some fresh air.

"Applying cold water on the forearms or a damp cloth to the forehead banishes the symptoms," Stimpel said.

Schuh recommends giving the body time to adjust.

"Take it easy, and don't take the symptoms too seriously," she said.

According to Holstein, "it's like mild jet lag - the body has been brought out of its accustomed rhythm."

DPA

5 comments

  • Well this explains this Tuesday for me, I was rubbish for the last two hours of work (light headed, couldn't concentrate, feeling super warm and snuggly). I got home and passed out on the couch for two hours.

    Still feeling it now at work, but not as bad :)

    Commenter
    Dicky
    Date and time
    August 23, 2012, 1:02PM
    • had a big weekend, did we dicky?

      Commenter
      suicide tuesday
      Date and time
      August 23, 2012, 4:48PM
    • Actually, no, it was a quiet weekend, it "felt" like a bad hangover but without the alcohol.

      Commenter
      Dicky
      Date and time
      August 24, 2012, 9:59AM
  • Assuming that Australia has something called "Spring" as in Europe, there may be some worth in this study.
    For a large number of people, it's a case of seasonal affective disorder coming on. For a lot of us, summer = depression. We love cooler weather, low humidity and darker days and nights. I feel alive on an overcast day with a cool breeze blowing. But hot days, empty skies and sunlight for months on end just get right up my sleeve -- and this view is not as uncommon as you might think.
    It's made worse by cheery weather presenters who are determined to tell us that 30-35 degrees celsius is a beautiful sunny day. For me and my ilk it's hell -- upside down.

    Commenter
    Professor Rosseforp
    Date and time
    August 24, 2012, 9:15AM
    • Australia may not have as much of the seasonal affects of Spring that Europe has, but it still has the sun peeping up earlier and pollen starting to drift in the air. In 2 weeks I've already noticed the sun is coming up earlier and earlier.

      Finally am waking up to sunlight!

      Commenter
      Caveat
      Date and time
      August 24, 2012, 9:59AM
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