The measurement of resting metabolic rate in preschool children.
OBJECTIVE
This study examined the repeatability of measuring resting metabolic rate (RMR) in preschool children and the effect of different calculation protocols.


METHODS
Eleven children (4 females and 7 males) participated in the project. They were recruited through advertisements in local schools and community centers. Resting metabolic rate was measured on 3 occasions over a 2-week period, each after an overnight fast and each lasting approximately 20 to 25 minutes. Results were compared using repeated-measures ANOVA to check for repeatability, and a number of methods of calculating RMR were assessed.


RESULTS
Repeatability of RMR measurements was good (coefficient of variation of replicates, 6.8%), with no significant difference between days of measurement. The lowest RMR measurement was obtained when the first 10 minutes were excluded and periods during which large activity was observed were excluded. This measurement was, on average, 4% lower than averaging the measurements after the first 5 minutes, including body movements.


CONCLUSIONS
This study suggests that RMR can be measured in preschool children and that the best method for calculating RMR in these subjects is to exclude periods when large body movements occur and the first 10 minutes of the measurement period. Only a single measurement of RMR is needed to obtain a reliable estimate.
Jackson
Diane M
DM
Division of Vascular Health, Rowett Research Institute, Greenburn Road, Bucksburn, Aberdeen AB21 9SB, Scotland. d.jackson@rowett.ac.uk
Pace
Lucienne
L
Speakman
John R
JR
D001481:Basal Metabolism / Q000502:physiology*; D002648:Child; D002675:Child, Preschool; D005260:Female; D006801:Humans; D008297:Male; D015203:Reproducibility of Results