From futura-sciences.com
Do you ever find yourself falling asleep on the couch after dinner or halfway through a TV series? It may seem harmless, but this habit is one you should try to break as soon as possible. Disrupted cycles, poor conditioning for sleep, and a higher risk of insomnia – dozing off unintentionally can lead to real consequences for your health. Three sleep specialists explain why.
Many people have experienced this familiar situation: you fall asleep on the living room couch in front of the television after a long day, then wake up and head to bed… only to discover that sleep won’t come back.
But beware. “Falling asleep unintentionally like this is not a good thing,” warns Dr Marc Rey, president of the French National Institute of Sleep and Vigilance. Caroline Rome, a sophrologist specialising in sleep and alertness at the Hôtel Dieu sleep centre in Paris, agrees. “When someone falls asleep like that, overwhelmed by fatigue, they lose control of their sleep – and that’s never a good sign.”
Here is why.
1. It reduces your sleep pressure
Falling asleep on the couch in the evening – especially if it isn’t planned – reduces what specialists call sleep pressure.
In simple terms, sleep pressure is the natural need your body builds up throughout the day to sleep at night. According to Dr Rey, when you briefly fall asleep in the living room and then wake up suddenly to move to your bedroom, you may struggle to fall asleep again.
“When we get home after a long day of work, feeling sleepy is completely normal,” he explains. “But we need to manage sleep the same way we manage food.”
One of the possible consequences is chronic sleep deprivation, because those lost moments of sleep can accumulate over time.
2. You fall asleep in poor conditions
Another problem is the environment in which people usually drift off on the couch. More often than not, it happens in front of a screen – the television, a computer, or even a tablet. And that’s far from ideal.
“It’s very bad to fall asleep in a noisy environment or while exposed to light,” says the specialist.
Our bodies naturally follow a day night rhythm. The hormone melatonin, which regulates sleep, is produced when light levels decrease. Artificial light from screens interferes with this process and can disrupt the body’s natural signals.
There is also the issue of comfort. A couch rarely provides the same support as a proper bed, which means people often fall asleep in awkward positions. And the living room itself is not always an ideal sleep environment.
Sophrologist Christel Neumager, who specialises in sleep in Chantepie near Rennes, highlights this point: “For good sleep quality, it’s important to sleep in a calm, dark room that isn’t cluttered – a peaceful space dedicated specifically to rest.”
3. It disrupts your sleep cycles
Just like meals, sleep works best when it follows a consistent rhythm. When you accidentally fall asleep on the couch, you might wake up a few hours later. This can fragment your sleep and disrupt your internal schedule.
This phenomenon was widely observed during the first lockdown.
“When people remain inactive and lying down all day, their rhythms collapse,” explains Dr Rey. “They doze during the day and then stay awake and stressed at night.”
Maintaining a clear contrast between waking hours and rest is essential for healthy sleep patterns.
Sleep itself follows specific cycles. First comes slow wave sleep, which allows the body to recover physically. Then comes REM sleep, which helps with memory and mental recovery.
“If you interrupt the first cycle, for example, you don’t simply regain it later – your body moves on to the next cycle,” explains Christel Neumager.
4. It disrupts your conditioning for sleep
Falling asleep in the living room instead of your bedroom can also weaken the mental cues your body associates with sleep.
“We are conditioned for sleep,” explains Caroline Rome. “When you enter your bedroom, your body prepares to sleep. It’s the same way entering the kitchen prepares you to eat.”
If you regularly fall asleep on the couch, these signals become blurred. As a result, the brain may no longer associate the bedroom as strongly with sleep, which can lead to poorer rest overall.
5. It can affect your health
Poor or irregular sleep has clear consequences for overall health.
According to Marc Rey, disrupted sleep can contribute to obesity, weaken the immune system, and increase feelings of irritability or low mood.
Sleep disorders also affect alertness and concentration during the day. Physically, the body does not recover properly.
6. It may reveal a sleep debt
Finally, falling asleep unintentionally on the couch may simply mean one thing: you are extremely tired.
“People who fall asleep like this often have a sleep debt,” explains Christel Neumager.
The key is learning to recognise signs of fatigue and listening to your body’s need for sleep. Ideally, you should go to bed as soon as that need appears.
It is also worth remembering that everyone’s sleep needs are different. Some people function perfectly on six hours of sleep, while others require nine hours to feel fully rested.
