TY - JOUR
T1 - Physiologic responses during rest on a sleep system at varied degrees of firmness in a normal population
AU - Lahm, Ryan
AU - Iaizzo, Paul A.
PY - 2002/9/15
Y1 - 2002/9/15
N2 - This study explores the hypothesis that a high degree of sustained muscle activity associated with a sub-optimal spinal orientation may compromise an individual's ability to relax or initiate sleep. Data from 22 participants who were considered to be part of a normal, back-pain-free population were used in these studies. Participants laid down on a mattress in a foetal position (i.e. on their sides) at three varying bed pressures while EMG activities, heart rates, blood pressures, subjective comfort levels and spinal alignment data were recorded. Minor effects of mattress inflation pressures were associated with changes in EMG activity, heart rate, blood pressure and/or subjective comfort. In contrast, spinal alignment assessment revealed significant differences between the three different inflation pressures studied (827.4, 2413.2 and 3999.0 Pa). It was concluded that in a population of normal participants, although mattress inflation pressure induced significant changes in spinal alignment, these changes were of little physiological consequence. Nevertheless, this data provides baseline information needed to assess similar correlations in a symptomatic population (e.g. those with either acute or chronic neck or back pain).
AB - This study explores the hypothesis that a high degree of sustained muscle activity associated with a sub-optimal spinal orientation may compromise an individual's ability to relax or initiate sleep. Data from 22 participants who were considered to be part of a normal, back-pain-free population were used in these studies. Participants laid down on a mattress in a foetal position (i.e. on their sides) at three varying bed pressures while EMG activities, heart rates, blood pressures, subjective comfort levels and spinal alignment data were recorded. Minor effects of mattress inflation pressures were associated with changes in EMG activity, heart rate, blood pressure and/or subjective comfort. In contrast, spinal alignment assessment revealed significant differences between the three different inflation pressures studied (827.4, 2413.2 and 3999.0 Pa). It was concluded that in a population of normal participants, although mattress inflation pressure induced significant changes in spinal alignment, these changes were of little physiological consequence. Nevertheless, this data provides baseline information needed to assess similar correlations in a symptomatic population (e.g. those with either acute or chronic neck or back pain).
KW - EMG
KW - Mattress interface pressures
KW - Spinal alignment
UR - http://www.scopus.com/inward/record.url?scp=0037107093&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0037107093&partnerID=8YFLogxK
U2 - 10.1080/00140130210159968
DO - 10.1080/00140130210159968
M3 - Article
C2 - 12487692
AN - SCOPUS:0037107093
SN - 0014-0139
VL - 45
SP - 798
EP - 815
JO - Ergonomics
JF - Ergonomics
IS - 11
ER -