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Critical evaluation of energy intake data using fundamental principles of energy physiology: 1. Derivation of cut-off limits to identify under-recording.
Minimum cut-off limits for energy intake below which a person of a given sex, age and body weight could not live a normal life-style are defined, derived from whole-body calorimeter and doubly-labelled water measurements in a wide range of healthy adults. Expand
Four-component model for the assessment of body composition in humans: comparison with alternative methods, and evaluation of the density and hydration of fat-free mass.
The results suggest that the three- and four-component models of body composition are not compromised by errors arising from individual techniques. Expand
Use of food quotients to predict respiratory quotients for the doubly-labelled water method of measuring energy expenditure.
A method is proposed for estimating the respiratory quotients (RQ) required in the calculation of free-living energy expenditure measured by the doubly-labelled water technique in man. WorkedExpand
High levels of energy expenditure in obese women.
In the obese women in this series there was no evidence that their obesity was caused by a metabolic or behavioural defect resulting in reduced energy expenditure, and basal metabolic rate and energy expenditure were identical in the two groups when corrected for differences in fat free mass and total body mass. Expand
Accuracy of weighed dietary records in studies of diet and health.
Energy intake as measured by the seven day weighed dietary record and total energy expenditure estimated concurrently by the doubly labelled water technique showed a serious bias in reporting habitual energy intake. Expand
Validation of estimates of energy intake by weighed dietary record and diet history in children and adolescents.
Results suggest that 7-d EI-WDRs tend to underestimate food intake of adolescents, and although Ei-DHs were biased towards overestimation in most age groups and individual measurements lacked precision, EI’s were more representative of habitual intake than were EI WDRs. Expand
Isotope method for the measurement of carbon dioxide production rate in man.
Longitudinal assessment of energy expenditure in pregnancy by the doubly labeled water method.
The variability in response emphasizes the problems in making prescriptive recommendations for individual women, because there is no way of predicting metabolic or behavioral responses to pregnancy. Expand
Simultaneous measurement of free-living energy expenditure by the doubly labeled water method and heart-rate monitoring.
The FLEX HR method provides a close estimation of the TEE of population groups, however, an increased number of sampling days may improve the precision of individual estimates of TEE. Expand
Daily energy expenditure in free-living children: comparison of heart-rate monitoring with the doubly labeled water (2H2(18)O) method.
HR monitoring provides a close estimation of the TEE of population groups and objective assessment of associated patterns of physical activity. Expand