Sleep Tests and Research

We all know that our resting hours are characterized by different phases. We really rest our brain and body in deep sleep, identified with sleep stages 3 and 4. The sleep stages 1 through 4 are collectively referred to as NREM (non-rapid eye movement) sleep. Rapid eye movement (REM), or stage 5, is not included. Unlike REM sleep, there is usually little or no eye movement during this stage.

NREM sleep is divided into four stages:

    * Stage 1:

    Between being awake and falling asleep - Light sleep

    * Stage 2:

    Onset of sleep - Becoming disengaged from surroundings - Breathing and heart rate are regular - Body temperature drops (so sleeping in a cool room is helpful)

    * Stages 3 and 4:

    Deepest and most restorative sleep - Blood pressure drops - Breathing becomes slower - Muscles are relaxed - Blood supply to muscles increases - Tissue growth and repair occurs - Energy is restored - Hormones are released, such as: Growth hormone, essential for growth and development, including muscle development

REM sleep (25% of night) first occurs about 90 minutes after falling asleep and recurs about every 90 minutes, getting longer later in the night and it's characterized by the following: Provides energy to brain and body - Supports daytime performance - Brain is active and dreams occur - Eyes dart back and forth - Body becomes immobile and relaxed, as muscles are turned off.


We also are aware about the importance of sleeping; If sleep is cut short, the body doesn't have time to complete all of the phases needed for muscle repair, memory consolidation and release of hormones regulating growth and appetite. Then we wake up less prepared to concentrate, make decisions, or engage fully in school and social activities.

Scientists have shown numerous ways in which sleep is related to memory. Working memory was shown to be affected by sleep deprivation*. Working memory is important because it keeps information active for further processing and supports higher-level cognitive functions such as decision making, reasoning, and episodic memory. 18 women and 22 men were allowed to sleep only 26 minutes per night over a 4-day period. Subjects were given initial cognitive tests while well rested and then tested again twice a day during the 4 days of sleep deprivation. On the final test the average working memory span of the sleep deprived group had dropped by 38% in comparison to the control group.

To further investigate we tested the sleep efficiency of Technogel based mattress compared to std foam's one. The test was conduced in Turin "Le Molinette" sleep center and showed results as follows:

Healthy volunteers were studied by in laboratory video-polysomnography (PSG).

During the night slept on the Technogel®-based mattress, a statistically significant increases were observed in time spent in non-rapid eye movement (NREM) sleep stage 3 and 4 (SWS), up to 45%, a decrese of time spent in NREM sleep stage 1 and wake after sleep onset (WASO), up to 33%. Moreover, skin and mattress temperature were lower and bed comfort higher.

No changes were found in REM sleep and stage shift.

Professor's findings show that in healthy volunteers gel-based (Technogel®) mattress consolidates sleep; this effect could be ascribed to the thermal and biomechanical differences between foam and gel.

Professor's study shows that the subjective bed comfort was significantly higher during the night slept on the Technogel®-based mattress, and that it could be due to the increase of sleep quality, given that the total sleep time and the time spent in deep sleep (SWS) increase, while the wake during sleep period (WASO) decreases in those nights.