Sleep Positions and Position Shifts in Five Age Groups: An Ontogenetic Picture

Koninck, Joseph De; Lorrain, Dominique; Gagnon, Pierre

doi:10.1093/sleep/15.2.143

Cited by 172 publications

(119 citation statements)

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“…It has been postulated that people over the age of 60 years adopt the RSL position for sleep due to age changes in cardio-vascular function [18] or due to discomfort including chest tightness and breathing difficulties in LSL [27]. In this study the greatest percentage of participants (30.8%) reported preference for the right side sleep position and RSL resulted in lower mean SBP, DBP and RPP and higher mean SpO2 than LSL.…”

Section: Discussionmentioning

confidence: 66%

“…Older people exhibit significant increased preference for the right side sleep position [18]. This has been postulated to be due to age related alterations in cardiovascular function [18] or compression from other structures causing reduction in ventricular distensibility [19].…”

Section: Body Position and Cardio-respiratory Variables In Older Peoplementioning

confidence: 99%

“…This has been postulated to be due to age related alterations in cardiovascular function [18] or compression from other structures causing reduction in ventricular distensibility [19].…”

Section: Body Position and Cardio-respiratory Variables In Older Peoplementioning

confidence: 99%

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Body position and cardio-respiratory variables in older people

Gordon

Jones

Sealey

et al. 2011

Archives of Gerontology and Geriatrics

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Background: Older people are placed in different body positions for medical, nursing and physiotherapy intervention.Objective: To investigate the effect of body position on cardio-respiratory variables in active older people.Design: Experimental laboratory study.Setting: Research was undertaken at the James Cook University, Physiotherapy Clinic.Subjects: Twenty-six active people aged 60 years and over.Methods: Heart rate, systolic and diastolic blood pressure and oxygen saturation were measured every two minutes over a ten minute period in five standardized positions, sitting, right side lying, left side lying, supine and supine with the head 20 degrees below the level of the body. Rate pressure product and mean arterial pressure were calculated. Smoking history, medication use, health conditions and activity level were recorded. Height, weight and body fat were measured.Results: Left and right side lying produced significantly lower diastolic and systolic blood pressure, rate pressure product and mean arterial pressure than supine with the head down. Older, healthy people have decreased forced vital capacity and forced expiratory volume after one second in side lying when compared to sitting [16]. Further healthy, seated older subjects 3 (>65 years) have significant impairment of ventilation distribution to dependent lung zones [17]. Body position and cardio-respiratory variables in older peopleOlder people exhibit significant increased preference for the right side sleep position [18]. This has been postulated to be due to age related alterations in cardiovascular function [18] or compression from other structures causing reduction in ventricular distensibility [19].This study investigates the effect of five standardised body positions on cardio-respiratory variables in a group of healthy, older people. Comparisons are made to previously reported findings for young and middle aged healthy people. MethodologyThe method of this observational study largely replicates Jones & Dean [4]. It is described here for the convenience of the reader and to identify alterations for this study.Participants were recruited from four Probus clubs (a community organisation for people aged over 60 years) in Townsville, Australia. Human research ethics approval was provided by James Cook University and signed informed consent was gained prior to participation.Participants were eligible to participate if they were over 60 years of age. A screening questionnaire (see Appendix 1 in the supplementary data on the journal website) was completed by participants to identify the presence of any physical or medical condition which would prevent participants from comfortably adopting each position included in the study for 20 minutes.Information regarding smoking history, usual exercise level, medication use, medical history and recent illness was also collected.

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Section: Discussionmentioning

confidence: 66%

Section: Body Position and Cardio-respiratory Variables In Older Peoplementioning

confidence: 99%

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Body position and cardio-respiratory variables in older people

Gordon

Jones

Sealey

et al. 2011

Archives of Gerontology and Geriatrics

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“…Normal sleeping patterns thus involve a certain amount of physical activity during the night. This is reflected, for example, by healthy people changing their posture, for instance, from lying on the back to lying on one side, between 10 and 30 times per night [15]. Nonetheless, too many posture changes occurring shortly after each other, that is, tossing around or staying in the same posture for less than 15 minutes at a time, indicate restless sleep of worse quality [14][15][16].…”

Section: Assessment Of Sleep Behavior Using Self-reports Polysomnogrmentioning

confidence: 99%

A New Approach for Assessing Sleep Duration and Postures from Ambulatory Accelerometry

et al. 2012

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Interest in the effects of sleeping behavior on health and performance is continuously increasing-both in research and with the general public. Ecologically valid investigations of this research topic necessitate the measurement of sleep within people's natural living contexts. We present evidence that a new approach for ambulatory accelerometry data offers a convenient, reliable, and valid measurement of both people's sleeping duration and quality in their natural environment. Ninety-two participants (14-83 years) wore acceleration sensors on the sternum and right thigh while spending the night in their natural environment and following their normal routine. Physical activity, body posture, and change in body posture during the night were classified using a newly developed classification algorithm based on angular changes of body axes. The duration of supine posture and objective indicators of sleep quality showed convergent validity with self-reports of sleep duration and quality as well as external validity regarding expected age differences. The algorithms for classifying sleep postures and posture changes very reliably distinguished postures with 99.7% accuracy. We conclude that the new algorithm based on body posture classification using ambulatory accelerometry data offers a feasible and ecologically valid approach to monitor sleeping behavior in sizable and heterogeneous samples at home.

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“…There is a moderate body of evidence which reports preferred sleep position and the consistency of such positions (3)(4)(5)(6)(7)(8). However there is very little information regarding the biomechanics of sleep posture on mattresses and pillows (9-12).…”

Section: Introductionmentioning

confidence: 99%

How Well Does Your Own Pillow Perform?

Gordon

Grimmer

2011

Journal of Musculoskeletal Pain

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These two papers report on findings from congruent yet separate studies regarding the performance of people's own pillow. Data for these papers was extracted from three previously published studies undertaken in the same South African adult-aged [18+ years] community by the same researchers:1. Study 1: a telephone survey administering a standard questionnaire, and 2. 18 months later, two concurrent experimental studies using five test pillows compared with subjects' "own" pillow: Study 2: a pillow field trial of waking symptoms, pillow comfort and sleep quality, and  Study 3: a photographic study of changes in cervical posture in side lying. All studies received ethics approvals from the University of South Australian HumanResearch Ethics Committee.Study 1 was a telephone survey of 812 randomly-selected participants from the local telephone directory. This study described and correlated "own" pillow type, use, age and performance, subjects' sleeping habits, waking symptoms, sleep quality, and pillow comfort.Subjects were asked to reflect on a "usual, recent" week when they provided this information."Own" pillow use was associated with self-reported waking symptoms [headache, neck pain, stiff neck, and scapula-arm pain] for approximately 46 percent subjects. Five pillow types were commonly used [polyester, foam regular, foam contour, feather, and latex]. In the year preceding the survey, 26.2 percent subjects had purchased a new pillow. The mean age of pillows in this study was 58.9 months [standard deviation [SD] 74.4 months]. New pillows were purchased for many reasons including poor support and comfort, neck discomfort, and compromised hygiene. This study did not validate subjects' self-report of "own" pillow type, shape, or age, nor measure waking symptom intensity. [comprising 61 subjects from the telephone survey and 45 recruits from advertisements] using a randomized controlled block-design. Differences were assessed in the effect of subjects' "own" pillow, and the test pillows, on retiring and waking symptoms [pain, stiffness, headache, and scapula-arm pain]. Where possible, subject's "own" pillow was inspected for shape, condition and content. Study 3 was a posture study in which 95 subjects [comprising 81 subjects from Study 2 and 14 additional recruits from advertisements] were photographed in a standardized side-lying position on each of the trial pillows, and "own" pillow, at 0 minutes and 10 minutes later. Short-term change in cervical spine posture on each pillow was compared. Cervico-thoracic posture was measured by digitising the x,y coordinates of five anatomical points [spinous processes of C2, C4, C7, and T3, and the external occipital protuberance], and calculating within-and between-point change in position over time.Subject's "own" pillow depth and the depth of the trial pillows were measured, to allow consideration of pillow performance with respect to altered pillow depth, by placing the pillow on a horizontal table surface and putting a horizontally levelled piece of masonite on top o...

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Sleep Positions and Position Shifts in Five Age Groups: An Ontogenetic Picture

Cited by 172 publications

References 0 publications

Body position and cardio-respiratory variables in older people

Body position and cardio-respiratory variables in older people

A New Approach for Assessing Sleep Duration and Postures from Ambulatory Accelerometry

How Well Does Your Own Pillow Perform?

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