Waking up tired despite adequate sleep?.. 3 factors in your room
Amman3 min read
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You may spend long hours in bed, only to wake up without feeling rested. This is not always due to lack of sleep, as a study involving young people suggests that room conditions, from temperature to light and noise, may be associated with lower quality sleep, even when the duration remains unchanged.
The study, led by researchers from Pennsylvania State University, analyzed data from 372 young adults, with an average age of 22. Its findings were published in the journal 'Sleep Health', before being presented by the university in a recent statement, highlighting the difference between the number of hours slept and the quality of sleep.
Hours don't tell the whole story
According to the university's presentation of the study, simply counting the time a person spends asleep is not enough to judge the quality of their sleep. Other details, such as waking up during the night and the time a person remains awake, can make a long night less restful than the clock suggests.
Over two weeks, participants recorded each morning their assessment of the previous night's sleep, and whether light, noise, or temperature had disturbed them.
They also wore wrist sensors to estimate sleep times, wake times, duration, and continuity, allowing a comparison of their personal impressions with independent measurements.
3 factors under the microscope
The study's analysis showed that feeling too warm in the sleeping area was associated with more wakefulness after sleep onset, and lower efficiency of sleep continuity. Noise in the room was linked to lower efficiency and worse sleep quality ratings.
Lighting described as intense by participants was associated with later sleep timing and lower probabilities of rating sleep as good.
However, the striking result was that these conditions were not associated with a clear change in total sleep duration. That is, a person may sleep a similar number of hours, while the quality of their nightly experience varies.
Why does discomfort differ from person to person?
Researchers focused on participants' perception of their surroundings, rather than setting a uniform level of noise, light, or temperature.
A sound that one person is used to in a busy city may be disturbing to another who grew up in a quiet place. Therefore, the study does not provide an ideal temperature for everyone, nor a numerical limit suitable for every room.
This detail is important when reading the results: what participants described as 'too hot' reflects their personal experience, not a measurement that determines the point at which sleep problems begin.
