Effect of time of day on height loss response variability in asymptomatic participants on two consecutive days
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(Published version)
Date
2019
Authors
Saiklang, P.
Puntumetakul, R.
Neubert, M.S.
Boucaut, R.
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Ergonomics, 2019; 62(12):1542-1550
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Abstract
Ergonomists measure height loss in relation to loads imposed on the spine. It is difficult to interpret whether height loss responses recorded on different days are accurate due to natural daily fluctuations in height loss and measurement variability. The objective of this research was to investigate whether the variability of height loss in the sitting position is affected by time of day and to analyse day-to-day variability in asymptomatic participants. Fifty asymptomatic participants attended two sessions (morning and afternoon) of stadiometry testing on four separate days. The results showed that a variability of height loss response changes in excess of 0.886 mm in morning and 1.128 mm in afternoon between days indicates that an intervention itself has influenced height loss. Future investigations on height loss in sitting should take theseresults into consideration to confidently state that an intervention has influenced height lossresponse at each time of day.
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Copyright 2019 Informa
Access Condition Notes: Accepted manuscript available after 1 October 2020