Measurement of body potassium with a whole-body counter: relationship between lean body mass and resting energy expenditure

Journal Article · Thu Sep 01 00:00:00 EDT 1988 · Mayo Clin., Proc.; (United States)

DOI:https://doi.org/10.1016/S0025-6196(12)62688-3· OSTI ID:6758412

Jensen, M D; Braun, J S; Vetter, R J; Marsh, H M

We conducted studies to determine whether the Mayo whole-body counter could be used to measure body potassium, and thus lean body mass (LBM), and whether moderate obesity alters resting energy expenditure when corrected for LBM. Twenty-four nonobese and 18 moderately obese adults underwent body potassium (40K) counting, as well as tritiated water space measurement and indirect calorimetry. LBM values predicted from 40K counting and tritiated water space measurements were highly correlated (P = 0.001; r = 0.88). Resting energy expenditure was closely related to LBM (P less than 0.0001; r = 0.78): kcal/day = 622 kcal + (LBM.20.0 kcal/kg LBM). In this relationship, the obese subjects did not differ from nonobese subjects. In summary, the Mayo whole-body counter can accurately measure LBM, and moderate obesity has no detectable effect on corrected resting energy expenditure.

• Research Organization: Mayo Clinic, Rochester, MN (USA)
• OSTI ID: 6758412
• Journal Information: Mayo Clin., Proc.; (United States), Vol. 63:9, Issue 9
• Country of Publication: United States
• Language: English

Related Subjects

59 BASIC BIOLOGICAL SCIENCES
POTASSIUM
BODY COMPOSITION
ADIPOSE TISSUE
METABOLISM
REGRESSION ANALYSIS
TRACER TECHNIQUES
TRITIUM COMPOUNDS
WHOLE-BODY COUNTERS
WHOLE-BODY COUNTING
ALKALI METALS
ANIMAL TISSUES
BODY
CONNECTIVE TISSUE
COUNTING TECHNIQUES
ELEMENTS
ISOTOPE APPLICATIONS
LABELLED COMPOUNDS
MATHEMATICS
MEASURING INSTRUMENTS
METALS
RADIATION DETECTORS
STATISTICS
TISSUES
550201* - Biochemistry- Tracer Techniques