Sleep Positions in the Young Adult and Their Relationship with the Subjective Quality of Sleep

The Effect of Body Posture on Brain Glymphatic Transport

“…Other mammals, including dogs, cats, and even elephants (Tobler, 1992), can also sleep in a recumbent (lateral) position; although animals in the wild have sleep behaviors adapted for survival and therefore have different sleep patterns compared with humans (e.g., shorter time in deep sleep and some mammals even sleep with their eyes open). In humans, studies have documented that body posture during sleep favors the lateral position (De Koninck et al, 1983). During normal sleep cycles, humans and rodents change posture several times (De Koninck et al, 1992).…”

“…Body position is also known to influence breathing patterns in the sleeping state (De Koninck et al, 1983;Rehder, 1998). In our study, all rodents were anesthetized with a mix of ketamine and xylazine, which is known to have the fewest respiratory depressant effects compared with other anesthetics (Schwenke and Cragg, 2004).…”

Sleeping Position, Expression of Anger and Subjective Sleep Quality in University Students

“…With respect to the four positions adopted, similar to the work of De Koninck et al, (1983), Gordon et al, (2004) and Yu (2012) but unlike the RLD and LLD positions explored by Agargun et al (2004) and the inclusion of the SUD position in the work of Ichijo and Akita (2017)their relationships with the expression of anger are analyzed, which revealed differences between them. The participants who sleep in the PD position showed higher scores than those adopting the RLD and LLD positions on the scales of Feelings of Anger, TraitAnger, Temperament of Anger, Anger Expression Index, and External Expression of Anger.…”

“…In addition, De Koninck et al, (1983) have previously shown that individuals having poor sleep quality spend more time on their backs and with their heads straight in comparison with good sleepers. Subsequently, Yu (2012) reported that the prone position was positively associated with high scores on neuroticism and emotional instability, as well as with the narrative content of disturbing dreams (being locked up, drowning, and unable to move).…”

“…For both women and men, sleeping in the right lateral decubitus position occurs more frequently than sleeping in the left lateral decubitus position, and whilst there are no differences in the frequency of changes in position, the supine type is more common than the lateral type (Ichijo & Akita, 2017 The literature is scarce in terms of studies that analyze the influence of adopted body position and sleep quality (Agargun, Boysan, & Hanoglu, 2004;De Koninck, Gagnon, & Lallier, 1983;Gordon, Grimmer, & Trott, 2004;Nojiri, Okumura, & Ito, 2014;Yu, 2012). The first work to relate sleeping body posture (right side versus left side) to the presence of nightmares or dreams of emotional content and subjective sleep quality, as measured by the Pittsburgh Sleep Quality Index (PSQI) (Agargun et al 2004), showed that the presence of nightmares was significantly higher in people who slept on the left side (40.9%) compared with those who slept on the right side (14.6%).…”