Biology:Sleeping positions
The sleeping position is the body configuration assumed by a person during or prior to sleeping. It has been shown to have health implications, particularly for babies.
Sleeping preferences
A Canadian survey found that 39% of respondents preferring the "log" position (lying on one's side with the arms down the side) and 28% preferring to sleep on their side with their legs bent.[1]
A Travelodge survey found that 50% of heterosexual British couples prefer sleeping back-to-back, either not touching (27%) or touching (23%). Spooning was next, with the man on the outside 20% of the time vs. 8% with the woman on the outside. 10% favoured the "lovers' knot" (facing each other with legs intertwined), though all but 2% separated before going to sleep. The "Hollywood pose" of the woman with her head and arm on the man's chest was chosen by 4%.[2]
Health issues
Sleep position in babies
In the 1958 edition of his best-selling book The Common Sense Book of Baby and Child Care, paediatrician Dr Benjamin Spock warned against placing a baby on its back, writing, "if [an infant] vomits, he's more likely to choke on the vomitus." However, later studies have shown that placing a young baby in a prone position increases the risk of sudden infant death syndrome (SIDS). A 2005 study concluded that "systematic review of preventable risk factors for SIDS from 1970 would have led to earlier recognition of the risks of sleeping on the front and might have prevented over 10,000 infant deaths in the UK and at least 50,000 in Europe, the USA, and Australasia."[3]
Sleep position and snoring
It is recommended that people at risk of obstructive sleep apnea sleep on their side[4] and with a 30° or higher elevation of the upper body.[5] Snoring, which may be (but is not necessarily) an indicator of obstructive sleep apnea, may also be alleviated by sleeping on one's side.[6][7]
Sleep position and heart disease
Modern scientific studies have suggested a beneficial effect of the right lateral decubitus position on the heart. In particular, one study assessed the autonomic effect of three sleep positions (supine, left lateral decubitus, and right lateral decubitus) in healthy subjects using spectral heart rate variability analysis. The results indicated that cardiac vagal activity was greatest when subjects were in the right lateral decubitus position.[8]
Sleep position and gastroesophageal reflux
The right lateral sleeping position results in much more reflux in the night than the left lateral position and prone position.[9][10]
Sleep position and sleep paralysis
Sleeping in the supine position has been linked to an increased occurrence of sleep paralysis.[11]
See also
- Lying (position)
- Human positions
- Sex positions
References
- ↑ "Good health rests on a good night's sleep/". 20 May 2019. https://atsleeprest.com/good-health-rests-on-a-good-nights/. Retrieved 27 July 2019.
- ↑ "Couples' sleeping poses uncovered". BBC News. 7 October 2006. http://news.bbc.co.uk/2/hi/5415052.stm. Retrieved 1 May 2010.
- ↑ Ruth Gilbert, Georgia Salanti, Melissa Harden and Sarah See (2005). "Infant sleeping position and the sudden infant death syndrome: systematic review of observational studies and historical review of recommendations from 1940 to 2002"[|permanent dead link|dead link}}], International Journal of Epidemiology, Oxford University Press.
- ↑ "Obstructive sleep apnea - Lifestyle Changes". University of Maryland Medical Center. http://www.umm.edu/patiented/articles/what_lifestyle_measures_medications_used_sleep_apnea_000065_7.htm. Retrieved 1 May 2010.
- ↑ Neill (January 1997). "Effects of sleep posture on upper airway stability in patients with obstructive sleep apnea". American Journal of Respiratory and Critical Care Medicine 155 (1): 199–204. doi:10.1164/ajrccm.155.1.9001312. PMID 9001312. http://ajrccm.atsjournals.org/cgi/content/abstract/155/1/199. Retrieved 1 May 2010.
- ↑ "Snoring and Sleep Apnea". American Association of Oral and Maxillofacial Surgeons. http://www.aaoms.org/sleep_apnea.php.
- ↑ Riley, Meg. "Mattress Of 2019: Buyer's Guide". https://www.sleepjunkie.org/best-mattress/. Retrieved 10 December 2015.
- ↑ Chen GY, Kuo CD. The effect of the lateral decubitus position on vagal tone. Anaesthesia. 1997;52:653–7. [PubMed]
- ↑ Khoury RM, Camacho-Lobato L, Katz PO, Mohiuddin MA, Castell DO. Influence of spontaneous sleep positions on nighttime recumbent reflux in patients with gastroesophageal reflux disease. Am J Gastroenterol. 1999 Aug;94(8):2069-73
- ↑ Fujiwara Y, Arakawa T, Fass R. Gastroesophageal reflux disease and sleep. Gastroenterol Clin North Am. 2013 Mar;42(1):57-70.
- ↑ Cheyne, J. A. (June 2002). "Situational factors affecting sleep paralysis and associated hallucinations: position and timing effects" (in en). Journal of Sleep Research 11 (2): 169–177. doi:10.1046/j.1365-2869.2002.00297.x. ISSN 0962-1105. PMID 12028482. http://doi.wiley.com/10.1046/j.1365-2869.2002.00297.x.
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