The bed unmade, the clothes in a ball on the chair, the books stacked on the bedside table. Nothing dramatic in appearance, an image that we know well. And yet, this seemingly innocuous visual disorder could have much more concrete effects than we imagine, particularly on something as essential as sleep.
A study conducted in 2017 by Pamela Thacher, a researcher at St. Lawrence University in New York State, looked directly at this link between the condition of a room and the quality of rest that takes place there. The result is clear: decluttering your bedroom can significantly improve the quality of sleep. A conclusion that makes sense when we understand the underlying physiological mechanism, documented by other research on the subject: the disorder acts as a real chronic stressor, capable of activating the hypothalamic-pituitary-adrenal axis, this set of glands and hormones responsible for the production of cortisol, the stress hormone.
Concretely, this activation results in an increase in cortisol levels in the evening, precisely when the body should instead begin its descent towards rest. This hormonal increase can significantly delay falling asleep and reduce the quality of deep sleep, the most restorative phase of the night cycle. The brain, even without us being fully aware of it, continues to treat the objects present in its field of vision as so much information to be managed: a pile of clothes becomes a silent reminder of an unfinished task, maintaining the mind in a state of vigilance that is not compatible with falling asleep.

What this task actually involves

Tidying up your room involves putting back in order the objects, clothes and personal belongings scattered around the space, especially those visible from the bed. Allow around 30 minutes for a complete session, a time which varies greatly depending on the level of accumulation since the last storage.

Tips and tricks for truly efficient storage

Starting with a single surface rather than the entire room, such as the nightstand or dresser top, allows you to create a quick and visible first victory, without getting overwhelmed by the apparent scale of the overall task.
Storing items out of sight, ideally in enclosed spaces rather than on open shelves, directly reduces the visual stimulation researchers have identified as a factor in keeping the brain alert. A closed cupboard neutralizes this “visual noise” much more effectively than storage that remains visible, even if perfectly aligned.
Making this tidying up an evening routine rather than a one-off weekend chore, by devoting ten minutes to it before bed, transforms the gesture into a real transition ritual between the day's activity and nighttime rest, reinforcing the signal sent to the brain that the time for rest is approaching.

With a significant improvement in the quality of sleep demonstrated by Pamela Thacher's study, tidying your bedroom goes far beyond the simple aesthetic question. This simple gesture, repeated regularly rather than carried out in an emergency, acts directly on a well-documented hormonal mechanism, with concrete repercussions on the quality of night's rest.