Journal of Applied Physiology
HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
QUICK SEARCH:   [advanced]


     

J Appl Physiol 41: 223-229, 1976;
8750-7587/76 $5.00
This Article
Right arrow Full Text (PDF)
Right arrow Submit a response
Right arrow Alert me when this article is cited
Right arrow Alert me when eLetters are posted
Right arrow Alert me if a correction is posted
Right arrow Citation Map
Services
Right arrow Email this article to a friend
Right arrow Similar articles in this journal
Right arrow Similar articles in PubMed
Right arrow Alert me to new issues of the journal
Right arrow Download to citation manager
Citing Articles
Right arrow Citing Articles via HighWire
Right arrow Citing Articles via Google Scholar
Google Scholar
Right arrow Articles by Womersley, J.
Right arrow Articles by Mahaffy, M.
Right arrow Search for Related Content
PubMed
Right arrow PubMed Citation
Right arrow Articles by Womersley, J.
Right arrow Articles by Mahaffy, M.

Journal of Applied Physiology, Vol 41, Issue 2 223-229, Copyright © 1976 by American Physiological Society

ARTICLES

Influence of muscular development, obesity, and age on the fat-free mass of adults

J. Womersley, J. V. Durnin, K. Boddy and M. Mahaffy

Body fat and the fat-free mass (FFM) were estimated in 36 men and 43 women deliberately chosen to represent a variety of physical types; these were 1) young sedentary, 2) "muscular," 3) younger obese, 4) older obese, and 5) older nonobese individuals of both sexes. The body fat and the FFM were estimated from measurements of body density (by total immersion in water, measurement being made of the residual volume of air present in the lungs at immersion) and from measurements of total body potassium (using a whole-body monitor to assess the natural 40K isotope present in the body). The muscular men and women and the younger obese men and women had a considerably greater FFM and thus had greater quantities of potassium than the corresponding sedentary groups. There were significantly different estimates of the FFM calculated from density and from total body K in three groups, the sedentary young men, the muscular, and the younger obese women. The density and the potassium content of the FFM appear to decline with obesity and aging. Muscular development is associated with a decrease in the density but an increase in the potassium content of the FFM.


This article has been cited by other articles:


Home page
 J. Appl. Physiol.Home page
G. E. van der Ploeg, R. T. Withers, and J. Laforgia
Percent body fat via DEXA: comparison with a four-compartment model
J Appl Physiol, February 1, 2003; 94(2): 499 - 506.
[Abstract] [Full Text] [PDF]

Home page
 Am. J. Physiol. Endocrinol. Metab.Home page
I. Larsson, A. K. Lindroos, M. Peltonen, and L. Sjostrom
Potassium per kilogram fat-free mass and total body potassium: predictions from sex, age, and anthropometry
Am J Physiol Endocrinol Metab, February 1, 2003; 284(2): E416 - E423.
[Abstract] [Full Text] [PDF]

Home page
 J. Appl. Physiol.Home page
M. L. Millard-Stafford, M. A. Collins, C. M. Modlesky, T. K. Snow, and L. B. Rosskopf
Effect of race and resistance training status on the density of fat-free mass and percent fat estimates
J Appl Physiol, September 1, 2001; 91(3): 1259 - 1268.
[Abstract] [Full Text] [PDF]

Home page
 J. Appl. Physiol.Home page
B. M. Prior, C. M. Modlesky, E. M. Evans, M. A. Sloniger, M. J. Saunders, R. D. Lewis, and K. J. Cureton
Muscularity and the density of the fat-free mass in athletes
J Appl Physiol, April 1, 2001; 90(4): 1523 - 1531.
[Abstract] [Full Text] [PDF]

Home page
 Am. J. Clin. Nutr.Home page
M. Probst, M. Goris, W. Vandereycken, and H. Van Coppenolle
Body composition of anorexia nervosa patients assessed by underwater weighing and skinfold-thickness measurements before and after weight gain
Am. J. Clinical Nutrition, February 1, 2001; 73(2): 190 - 197.
[Abstract] [Full Text] [PDF]


HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
Visit Other APS Journals Online