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She sleeps four hours a night with the help of a pill. She’s 95
Chronic insomniacs are treated harshly in the media. We’re told that six hours of sleep damages the brain, weakens the immune system, and causes the heart to fail. That the risk of depression increases. And yet, some people still make it to 95 just fine
Jorge Marten Groen
May 73 min read


Always switched on: how hyperarousal sabotages your sleep
People with insomnia have a specific tension profile, in which sleep-related and anxiety-related forms weigh most heavily. This explains why insomnia can be so persistent
Jorge Marten Groen
May 43 min read


Chronic insomnia makes your brain four years older
A forty percent higher risk of dementia. Brains that function as if they are four years older. These are the figures from a study involving more than 2,700 adults with chronic insomnia
Jorge Marten Groen
Apr 302 min read
If you’re last on your own list, you often end up paying the price at night
When you’re under pressure your body enters a state of alertness. The stress hormone cortisol keeps you vigilant. That’s useful in urgent situations, but the brain doesn’t distinguish between a caregiving task tomorrow morning and a lion around the corner. Under stress, the body remains in a heightened state of readiness, which prevents proper recovery during sleep. As a result, you either don’t get enough sleep or the quality of your sleep declines.
Jorge Marten Groen
Apr 283 min read


Bad sleep can be in your DNA, but you can often do something about it
If you think you sleep poorly because your father or mother did too, and that it’s simply “in your DNA,” some nuance is needed. Predisposition explains why you may be more vulnerable. It doesn’t necessarily explain why you’re sleeping poorly now or why it just isn’t improving.
Jorge Marten Groen
Apr 212 min read


What others post on social media about sleep (and whether it’s accurate)
During a scroll through social media, I notice how persistent certain sleep myths still are. I’ve listed four common ones.
Jorge Marten Groen
Apr 133 min read


The viral ‘Dutch method’ sleep hack gets one important thing wrong
The ‘Dutch Method’: A viral sleep trend that misses the science
Jorge Marten Groen
Mar 313 min read


Exhausted and yet awake, this is what goes wrong
The metaphor of the accelerator pedal and brake pedal is powerful because it provides insight. It shows that insomnia is not a lack of ability to sleep, but a disruption of balance. It’s something that arises when your system receives the right signals and nothing is standing in the way anymore
Jorge Marten Groen
Mar 193 min read


What 47 million nights of sleep data reveal about your health
The analysis of a massive sleep dataset mainly shows that sleep is not a mysterious process over which you have little control. On the contrary, small and consistent behavioral changes can already make a big difference.
Jorge Marten Groen
Mar 133 min read


90% of the time, we live under artificial light, and our biological clock notices it
Light is a powerful signal for the body. It influences our biological clock, sleep, mood, and cognitive performance. But it’s not just about how bright the light is. It also matters when and what type of light we’re exposed to.
Jorge Marten Groen
Mar 103 min read


The silent epidemic: sleep deprivation in young people
According to the American Academy of Sleep Medicine and the American Academy of Pediatrics, young people between the ages of thirteen and eighteen need eight to ten hours of sleep per night for optimal health and development. Yet the majority do not meet this standard
Jorge Marten Groen
Mar 93 min read


Why do you suddenly get a burst of energy right before going to sleep?
Many people experience a surge of alertness shortly before bedtime. Why is that?
Jorge Marten Groen
Feb 122 min read


The beneficial effect of yoga, Tai Chi and walking on your sleep
Which forms of physical activity are the most sleep-inducing? Research by an international team, drawn from several Asian universities, provides the answer.
Jorge Marten Groen
Aug 9, 20252 min read


A bad night doesn’t have to make a bad day
Do you remember pulling an all-nighter in the past? Did you have a bad day the next day?
Jorge Marten Groen
Aug 7, 20251 min read


The harder we try to sleep, the harder it becomes
Forcing sleep rarely works. It’s precisely by letting go of control and accepting the natural rhythms of our bodies that we can experience better sleep.
Jorge Marten Groen
Jul 10, 20252 min read
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