Estimation of Total Body Fat from Potassium-40 Content

Anderson, E. C.; Langham, W.H.; Forbes, Gilbert B.; Hursh, John B.

doi:10.1126/science.133.3468.1917

Cited by 81 publications

(2 citation statements)

References 15 publications

(5 reference statements)

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“…Not long after, in 1945, Pace and Rathbun described the hydration constancy of FFM that provided the basis of the two‐compartment hydrometry model (42). In 1961, Anderson and his colleagues reported a fat estimation method based upon whole‐body 40 K counting (43), and in 1963, Moore and his colleagues reported the use of total body potassium and exchangeable potassium for estimation of ‘body cell mass’(44). The stage was thus set for moving beyond body weight and height as a means of adjusting REE for between‐individual differences in body size.…”

Section: Resting Energy Expenditure Predictionmentioning

confidence: 99%

Evolving concepts on adjusting human resting energy expenditure measurements for body size

et al. 2012

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Establishing if an adult’s resting energy expenditure (REE) is high or low for their body size is a pervasive question in nutrition research. Early workers applied body mass and height as size measures and formulated the Surface Law and Kleiber’s Law, although each has limitations when adjusting REE. Body composition methods introduced during the mid-twentieth century provided a new opportunity to identify metabolically homogeneous “active” compartments. These compartments all show improved correlations with REE estimates over body mass-height approaches, but collectively share a common limitation: REE-body composition ratios are not “constant” but vary across men and women and with race, age, and body size. The now-accepted alternative to ratio-based norms is to adjust for predictors by applying regression models to calculate “residuals” that establish if a REE is relatively high or low. The distinguishing feature of statistical REE-body composition models is a “non-zero” intercept of unknown origin. The recent introduction of imaging methods has allowed development of physiological tissue-organ based REE prediction models. Herein we apply these imaging methods to provide a mechanistic explanation, supported by experimental data, for the non-zero intercept phenomenon and in that context propose future research directions for establishing between subject differences in relative energy metabolism.

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Section: Resting Energy Expenditure Predictionmentioning

confidence: 99%

Evolving concepts on adjusting human resting energy expenditure measurements for body size

et al. 2012

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“…A similar trend has been noted in Finland. (") Since potassium concentration in lean fat-free mass is assumed to be constant, (27) the higher potassium concentration in Lapps means that they contain less fat. Their greater physical activity makes this fact not surprising.…”

Section: Irradiation From Natural Sourcesmentioning

confidence: 99%

External and Internal Irradiation of Swedish Reindeer Breeders 1950-1970

Gustafsson¹

1969

Health Physics

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The l37Cs body burden of Swedish reindeer-breeding Lapps, which was at a maximum in early summer, 1965, has been studied since 1961. Our investigation of the seasonal variation in 1965 and 1966 shows that the annual 137Cs dose to Lapps can be estimated by only one observation a year of the body burden. I n June, 1967 a survey was made in two Lapp communities with a portable sensitive yradiation dosimeter. In addition to indoor and outdoor measurements, the shielding effect of the snow cover was also studied. The total external natural irradiation amounted to 67 mrad/yr; the external irradiation from fallout during the period 1950-70 is calculated to be about 55 mrad, an average increase of 4% over the natural external irradiation.The 55Fe body burden of Swedish Lapps has been estimated by analyses of blood samples.The dose from other natural and artificial radioactivity, especially 40K, 210Po and 90Sr, has been calculated. The RBE of 210Po cc-particles is discussed. The average absorbed dose in the body from natural irradiation amounts to 95 mrad/yr. The irradiation from fallout, dominated by the contribution of 700 mrad from 137Cs, reaches 760 mrad during the twenty-year period. Comparisons are made with the irradiation of other Swedes and with other arctic groups with similar food habits.

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Introduction—a perspective

Wertheimer

1965

Comprehensive Physiology

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Estimation of Total Body Fat from Potassium-40 Content

Abstract: A brief review is given of the development of methods for the determination of total body potassium by whole-body scintillation counting and of studies to establish the utility of body potassium as a measure of gross body composition including fat.

Cited by 81 publications

References 15 publications

Evolving concepts on adjusting human resting energy expenditure measurements for body size

Evolving concepts on adjusting human resting energy expenditure measurements for body size

External and Internal Irradiation of Swedish Reindeer Breeders 1950-1970

Introduction—a perspective

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