The optimal temperature for sleep is between 60 to 65 degrees Fahrenheit or 16 to 18 degrees Celsius. Sudden, loud noises from outside or inside the home can result in fragmented sleep. Recent research published in the journal Perceptual and Motor Skills found that noise from passing traffic can make sleep shallower, or even cause the sleeper to awaken. Affect One in Four Twenty-six percent attributed frequent sleep disruptions to the level of light in their room. An equal number said the condition of their mattress regularly bothered their sleep.
Light is indeed a powerful cue that can reset the body's circadian rhythm and tell it to wake up.
To get a restful night's sleep, sleep in a dark room. A mattress that's past its prime can cause sleepers to toss and turn all night, with their muscles working overtime to support their bodies. Complete information on how to conduct a rest test and how to find the right mattress to meet individual comfort preferences is available in the Better Sleep Guide . As the findings attest, even though a vast majority say they can control their sleep environment, a sizable number report tossing and turning because one or more of these four factors frequently disturbs their sleep. The study found that even regular levels of household light can interfere with the natural internal clock that programs people to wake and sleep.