Acheson, K. J., Campbell, I. T., Edholm, O. G., Miller, D. S. & Stock, M. J. (1980) The measurement of daily energy expenditure: an evaluation of some techniques. American Journal of Clinical Nutrition 33, 1155–1164.
Bitar, A., Vermorel, M., Fellmann, N., Bedu, M., Chamoux, A. & Coudert, J. (1996) Heart-rate recording method validated by whole-body indirect calorimetry in 10-year-old children. Journal of Applied Physiology 81, 1169–1173.
Black, A. E. (1996) Physical activity levels from a meta-analysis of doubly labeled water studies for validating energy intake as measured by dietary assessment. Nutrition Reviews 54, 170–174.
Black, A. E., Coward, W. A., Cole, T. J. & Prentice, A. M. (1996) Human energy expenditure in affluent societies: an analysis of 574 doubly-labelled water measurements. European Journal of Clinical Nutrition 50, 72–92.
Bland, J. M. & Altman, D. G. (1986) Statistical methods for assessing agreement between two methods of clinical measurement. Lancet 1, 307–310.
Calloway, D. H. & Zanni, E. (1980) Energy requirements and energy expenditure of elderly men. American Journal of Clinical Nutrition 33, 2088–2092.
Ceesay, S. M., Prentice, A. M., Day, K. C., Murgatroyd, P. R., Goldberg, G. R. & Scott, W. (1989) The use of heart rate monitoring in the estimation of energy expenditure: a validation study using indirect whole-body calorimetry. British Journal of Nutrition 61, 175–186.
Christensen, C. C., Frey, H. M. M., Foenstelien, E., Aadland, E. & Refsum, H. E. (1983). A critical evaluation of energy expenditure estimates based on individual O2 consumption/heart rate curves and average daily heart rate. American Journal of Clinical Nutrition 37, 468–472.
Cole, T. J. & Coward, W. A. (1992) Precision and accuracy of doubly labeled water energy expenditure by multipoint and two-point methods. American Journal of Physiology 263, E965–E973.
Dalosso, H. M., Morgan, K., Bassey, E. J., Jebrahim, S. B., Fentem, P. H. & Avie, T. H. D. (1988) Levels of customary physical activity among the old and the very old living at home. Journal of Epidemiology and Community Health 42, 121–127.
Elia, M. (1991). Energy equivalents of CO2 and their importance in assessing energy expenditure when using tracer techniques. American Journal of Physiology 260, E75–E88.
Emons, H. J. G., Groenenboom, D. C., Westerterp, K. R. & Saris, W. H. M. (1992). Comparison of heart rate monitoring combined with indirect calorimetry and the doubly labelled water (2H 18O) method for the measurement of energy expenditure in children. European Journal of Applied Physiology 65, 99–103.
Food and Agricultural Organization/World Health Organization/United Nations University (1985) Energy and Protein Requirements. Technical Report Series no. 724. Geneva: WHO.
Forbes, G. B. & Reina, J. C. (1976) Adult lean body mass declines with age: some longitudinal observations. Metabolism 19, 653–663.
Geissler, C. A., Dzumbira, T. M. & Noor, M. I. (1986) Validation of a field technique for the measurement of energy expenditure: factorial method versus continuous respirometry. American Journal of Clinical Nutrition 44, 596–602.
Gonfiantini, R. (1978) Standards for stable isotope measurements in natural compounds. Nature 271, 534–536.
Goran, M. I. & Poehlman, E. T. (1992) Total energy expenditure and energy requirements in healthy elderly persons. American Journal of Physiology 263, E950–E957.
Livingstone, B. E., Coward, W. A., Prentice, A. M., Davies, P. S. W., Strain, J. J., McKenna, P. G., Mahoney, C. A., White, J. A., Steward, C. M. & Kerr, M. J. J. (1992). Daily energy expenditure in free-living children: comparison of heart-rate monitoring with the doubly labeled water (2H18O) method. American Journal of Clinical Nutrition 56, 343–352.
Livingstone, B. E., Prentice, A. M., Coward, W. A., Ceesay, S. M., Strain, J. J., McKenna, P. G., Nevin, G. B., Barker, M. E. & Hickey, R. J. (1990) Simultaneous measurement of free-living energy expenditure by the doubly labeled water method and heart-rate monitoring. American Journal of Clinical Nutrition 52, 59–65.
Pannemans, D. L. E. & Westerterp, K. R. (1993) Estimation of energy intake to feed subjects at energy balance as verified with doubly labelled water: a study in the elderly. European Journal of Clinical Nutrition 47, 490–496.
Patrick, J. M., Bassey, E. J., Irving, J. M., Blecher, A. & Fentem, P. H. (1986) Objective measurements of customary physical activity in elderly men and women before and after retirement. Quaterly Journal of Experimental Physiology 71, 47–58.
Prentice, A. M. (1992) Energy expenditure in the elderly. European Journal of Clinical Nutrition 46, S21–S28.
Ritz, P., Cole, T. J., Couet, C. & Coward, W. A. (1996) Precision of DLW energy expenditure measurements: contribution of natural abundance variations. American Journal of Physiology 270, E164–E169.
Ritz, P. & Coward, W. A. (1995) Doubly labelled water measurement of total energy expenditure. Diabète et Métabolisme 21, 241–251.
Schoeller, D. A., Van Santen, E., Peterson, D. W., Dietz, W., Jaspan, J. & Klein, P. D. (1980). Total body water measurement in humans with 18O and 2H labeled water. American Journal of Clinical Nutrition 33, 2686–2693.
Schoeller, D. A. (1988) Measurement of energy expenditure in free-living humans by using doubly labeled water. Journal of Nutrition 118, 1278–1289.
Schoeller, D. A. & Hnilicka, J. M. (1996) Reliability of the doubly labeled water method for the measurement of total daily energy expenditure in free-living subjects. Journal of Nutrition 126, 348S–354S.
Seale, J. L. (1995). Energy expenditure measurements in relation to energy requirements. American Journal of Clinical Nutrition 62, Suppl, 1042S–1046S.
Sheng, H. P. & Huggins, R. A. (1979) A review of body composition studies with emphasis on total body water and fat. American Journal of Clinical Nutrition 32, 630–647.
Spurr, G. B., Dufour, D. L. & Reina, J. C. (1996) Energy expenditure of urban Colombian women: a comparison of patterns and total energy expenditure by the heart rate and factorial methods. American Journal of Clinical Nutrition 63, 870–878.
Spurr, G. B., Prentice, A. M., Murgatroyd, P. R., Goldberg, G. R., Reina, J. C. & Christman, B. S. (1988) Energy expenditure from minute-by-minute heart-rate recording: comparison with indirect calorimetry. American Journal of Clinical Nutrition 48, 552–559.
Vermorel, M., Bitar, A. & Vernet, J. (1995) Calorimétrie indirecte. 3 - Contrôle de la validité des mesures des échanges respiratoires des animaux et des humains (Control of the respiratory exchange measurements validity in animals and human beings). Cahiers des Techniques de l'INRA 35, 63–76.
Visser, M., de Groot, L. C. P., G., M., Deurenberg, P. & van Staveren, W. A. (1995 a) Validation of dietary history method in a group of elderly women using measurements of total energy expenditure. British Journal of Nutrition 74, 775–785.
Visser, M., Deurenberg, P., van Staveren, W. A. & Hautvast, J. G. A. J. (1995 b) Resting metabolic rate and diet-induced thermogenesis in young and elderly subjects: relationship with body composition, fat distribution, and physical activity level. American Journal of Clinical Nutrition 61, 772–778.
Visser, M., van der Horst, A., de Groot, L. C. P., G., M., Deurenberg, P. & van Staveren, W. A. (1995 c) Energy cost of physical activities in healthy elderly women. Metabolism 44, 1046–1051.
Voorrips, L. E., van Acker, T. M. C. J., Deurenberg, P. & van Staveren, W. A. (1993) Energy expenditure at rest and during standardized activities: a comparison between elderly and middle-aged women. American Journal of Clinical Nutrition 58, 15–20.
Weir, J. B. de V. (1949) New methods for calculating metabolic rate with special reference to protein metabolism. Journal of Physiology 109, 1–9.
Wong, W. W., Lee, L. S. & Klein, P. D. (1987) Deuterium and oxygen-18 measurements on microliter samples of urine, plasma, saliva and human milk. American Journal of Clinical Nutrition 45, 905–913.