Isotemporal Substitution Paradigm for Physical Activity Epidemiology and Weight Change

Isotemporal Substitution Paradigm for Physical Activity Epidemiology and Weight Change

For a fixed amount of time engaged in physical activity, activity choice may affect body weight differently depending partly on other activities’ displacement. Typical models used to evaluate effects of physical activity on body weight do not directly address these substitutions. An isotemporal subs...

Full description

Saved in:
Bibliographic Details
Published in:American journal of epidemiology 2009-08, Vol.170 (4), p.519-527
Main Authors: Mekary, Rania A., Willett, Walter C., Hu, Frank B., Ding, Eric L.
Format: Article
Language:eng
Subjects:
Adult
Analysis. Health state
Anthropometry - methods
Biological and medical sciences
body weight changes
epidemiologic methods
Epidemiology
Exercise
Exercise - physiology
Female
General aspects
Humans
Jogging - physiology
Medical sciences
Miscellaneous
Models, Statistical
motor activity
Practice of Epidemiology
Prospective Studies
Public health. Hygiene
Public health. Hygiene-occupational medicine
Research methodology
statistical
Television
Time Factors
United States
Walking - physiology
Weight control
Weight Gain
Weight Loss
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:For a fixed amount of time engaged in physical activity, activity choice may affect body weight differently depending partly on other activities’ displacement. Typical models used to evaluate effects of physical activity on body weight do not directly address these substitutions. An isotemporal substitution paradigm was developed as a new analytic model to study the time-substitution effects of one activity for another. In 1991–1997, the authors longitudinally examined the associations of discretionary physical activities, with varying activity displacements, with 6-year weight loss maintenance among 4,558 healthy, premenopausal US women who had previously lost >5% of their weight. Results of isotemporal substitution models indicated widely heterogeneous relations with each physical activity type (P 
ISSN:0002-9262
1476-6256