Methodological considerations for meal-induced thermogenesis : measurement duration and reproducibility
Ruddick-Collins, Leonie C., King, Neil A., Byrne, Nuala M., & Wood, Rachel E. (2013) Methodological considerations for meal-induced thermogenesis : measurement duration and reproducibility. British Journal of Nutrition, 110(11), pp. 1978-1986.
Meal-Induced Thermogenesis (MIT) research findings are highly inconsistent, in part, due to the variety of durations and protocols used to measure MIT. We aimed to determine:
1) the proportion of a 6 h MIT response completed at 3, 4 and 5 h;
2) the associations between the shorter durations and the 6 h measure;
3) whether shorter durations improved the reproducibility of the measurement.
MIT was measured in response to a 2410 KJ mixed composition meal in ten individuals (5 male, 5 female) on two occasions. Energy expenditure was measured continuously for 6 h post-meal using indirect calorimetry and MIT was calculated as the increase in energy expenditure above the pre-meal RMR. On average, 76%, 89%, and 96% of the 6 h MIT response was completed within 3, 4 and 5 h respectively, and the MIT at each of these time points was strongly correlated to the 6 h MIT (range for correlations, r = 0.990 to 0.998; p < 0.01). The between-day CV for the 6 h measurement was 33%, but was significantly lower after 3 h of measurement (CV = 26%, p = 0.02). Despite variability in the total MIT between days, the proportion of the MIT that was complete at 3, 4 and 5 h was reproducible (mean CV: 5%). While 6 h is typically required to measure the complete MIT response, 3 h measures provide sufficient information about the magnitude of the MIT response and may be applicable for measuring individuals on repeated occasions.
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|Item Type:||Journal Article|
|Keywords:||meal induced thermogenesis, postprandial, thermic effect of food, reproducibility, energy expenditure|
|Subjects:||Australian and New Zealand Standard Research Classification > MEDICAL AND HEALTH SCIENCES (110000) > HUMAN MOVEMENT AND SPORTS SCIENCE (110600) > Exercise Physiology (110602)|
|Divisions:||Current > QUT Faculties and Divisions > Faculty of Health
Current > Institutes > Institute of Health and Biomedical Innovation
Current > Schools > School of Exercise & Nutrition Sciences
|Copyright Owner:||Copyright 2013 The Author(s)|
|Deposited On:||26 Sep 2013 23:00|
|Last Modified:||03 Sep 2014 14:51|
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