Compartmental body composition based on total-body nitrogen, potassium, and calcium
- 30 November 1980
- journal article
- research article
- Published by American Physiological Society in American Journal of Physiology-Endocrinology and Metabolism
- Vol. 239 (6), E524-E530
- https://doi.org/10.1152/ajpendo.1980.239.6.e524
Abstract
The techniques of prompt gamma neutron-activation analysis for the measurement of total-body nitrogen and whole-body counting for the measurement of total-body potassium were used to determine the mass of muscle and nonmuscle lean tissue and their protein content in 135 normal male and female subjects, 20–80 yr of age. Age-related changes in the size of the muscle and nonmuscle compartments and their protein content provide basic data for the investigation of protein metabolism in aging subjects and in individuals with various metabolic disorders, particularly wasting diseases such as cancer. Significant age-related changes in the size of various body compartments were noted. The loss of muscle mass and its protein content contrasts with the relative constancy of the nonmuscle lean tissue and suggests that skeletal muscle is particularly vulnerable to the aging process.This publication has 14 references indexed in Scilit:
- In vivo quantification of body nitrogen and body composition in normal subjects and in cancer patients for cancer‐nutrition studiesNutrition and Cancer, 1980
- Muscle chemistry of critically ill surgical patients and the effects of a course of intravenous nutritionBritish Journal of Surgery, 1978
- Prompt gamma neutron activation analysis to measure whole body nitrogen absolutely: Its application to studies of in-vivo changes in body composition in health and diseaseJournal of Radioanalytical and Nuclear Chemistry, 1977
- OBITUARYHealth Physics, 1976
- In vivo neutron activation analysisAmerican Journal Of Medicine, 1974
- MEASUREMENT OF WHOLE-BODY NITROGEN BY NEUTRON-ACTIVATION ANALYSISThe Lancet, 1973
- A whole-body counter with an invariant response to radionuclide distribution and body sizePhysics in Medicine & Biology, 1969
- THREE‐COMPONENT BODY COMPOSITION ANALYSIS BASED ON POTASSIUM AND WATER DETERMINATIONS*Annals of the New York Academy of Sciences, 1963
- LEAN BODY MASSA.M.A. Archives of Internal Medicine, 1953
- THE SPECIFIC GRAVITY OF HEALTHY MENJournal of the American Medical Association, 1942