... determined by l -[1- 13 C]leucine during feeding remained constant during both exercise regimens, when expressed either in terms of body weight or fat-free mass derived from measurements of total body potassium. 3. Quadriceps muscle protein synthetic rate increased during the study, from 0.0712 to 0.0985%/h...

...L. Burkinshaw; D. B. Morgan 1. An estimate of the mass of fat-free tissue in the body can be calculated from body weight and skinfold thickness; this estimate is called the ‘fat-free mass'. Total body potassium and nitrogen are alternative estimates. Factor analysis of data for healthy subjects has...

...C. J. Edmonds; T. Smith; R. D. Griffiths; J. Mackenzie; R. H. T. Edwards 1. Total body potassium ( 40 K method) and total body water and exchangeable sodium (both by isotope dilution) were determined in 26 boys, aged 5-17 years, with muscular dystrophy. Total body potassium values were compared...

...D. B. Morgan; L. Burkinshaw 1. Many previous reports have shown that the ratio of total body potassium to fat-free tissue mass is, on average, higher in men than in women. 2. In an attempt to explain this finding we have re-examined our own data and data taken from the literature. Our own data...

... previously described, with a coefficient of variation for duplicate analyses of 2.3%. 3. A comparison between intraleucocyte potassium concentration and total body potassium in five patients with pathological alterations in their potassium balance showed that intracellular potassium concentration may reflect...

...C. J. Edmonds; T. Smith 1. Body weight and total body potassium were measured in 23 hyperthyroid patients before and at various stages during treatment and in 19 athyreotic patients who were being treated with high-dose l-thyroxine. 2. In the hyperthyroid patients the total body potassium rose...

...B. Rajagopalan; G. W. Thomas; L. J. Beilin; J. G. G. Ledingham 1. Plasma volume, 24 h urine sodium and total body potassium were similar among 89 previously untreated patients with mild hypertension and 89 control subjects matched for age and sex. 2. Total body potassium correlated with renin...

...H. M. Brecht; E. Werner; W. Schoeppe 1. The effect of long-term treatment with prindolol on blood pressure, total body potassium (K t ), exchangeable sodium (Na e ) and plasma renin activity was investigated in twelve patients with essential hypertension. 2. Systolic and diastolic pressures were...

... in the erythrocyte mass and the total amount of potassium in the plasma. The total body potassium was measured in a whole-body monitor. 2. In normal subjects a close correlation was found between total erythrocyte potassium and total body potassium and also between total plasma potassium and total body potassium. 3...

...K. Boddy; Priscilla C. King; F. Carswell 1. Total body potassium was measured, by whole-body counting, in children with coeliac disease and in children not having this disease, matched as closely as possible with respect to sex, height, weight and age. 2. The measured total body potassium...

...C. J. Edmonds; B. M. Jasani; T. Smith 1. Total body potassium was estimated by 40 K measurement with a high-sensitivity whole-body counter in normal individuals over a wide age range and in patients who were obese or were grossly wasted as a result of various conditions which restricted food intake...