Myths and truths about sleep

Sleep remains one of the greatest enigmas in biology. We know it's essential for life, but many myths still circulate about it. In this article, we clarify some of the most common beliefs.

1. Everyone needs eight hours of sleep

Myth. While eight hours is a useful guideline, rest needs vary from person to person. Some adults feel comfortable with seven hours, while others need nine to fully recover. The most important thing is to pay attention to your body's signals, such as your energy levels during the day and your ability to concentrate.

2. Napping is bad for you

Myth. Short naps, between 15 and 30 minutes, can be extremely beneficial. They improve attention, increase productivity, and reduce fatigue. The problem arises when the nap is too long or taken late in the afternoon, which can disrupt nighttime sleep.

3. Blue light affects sleep

True. Exposure to cell phone, computer, and television screens before bed can delay the production of melatonin, the sleep hormone. This makes it harder to fall asleep and reduces the quality of rest. Therefore, it's recommended to avoid screen time at least an hour before bed.

4. Bedroom temperature influences sleep

True. Sleeping in a room that's too hot or too cold can interfere with your natural sleep cycle. The ideal temperature encourages the body to relax and enter the deep stages of rest. A cool, comfortable environment helps you fall asleep faster and stay asleep throughout the night.

5. The brain “switches off” during sleep

Myth. The brain remains active, processing memories, regulating hormones, and repairing tissues. It is precisely during deep rest that many vital functions occur.

Understanding the myths and truths about sleep helps you make more informed decisions about your rest habits. And above all, listening to your body is essential to understanding whether you're getting truly restful sleep.