Non-exercise activity thermogenesis

James A. Levine

Research output: Contribution to journalArticle

36 Citations (Scopus)

Abstract

Non-exercise activity thermogenesis (NEAT) is the energy expended that is not from sleeping, eating or sports-like exercise. It ranges from the energy expended walking to work, typing, performing yard work, undertaking agricultural tasks and fidgeting. NEAT can be measured by one of two approaches. The first approach is to measure or estimate total NEAT. Here, total daily energy expenditure is measured and from it is subtracted BMR + thermic effect of food. The second is the factoral approach whereby the components of NEAT are quantified and total NEAT calculated by summing these components. The amount of NEAT that human subjects perform represents the product of the amount and types of physical activities and the thermogenic cost of each activity. The factors that affect the NEAT of a human subject are readily divisible into biological factors, such as weight, gender and body composition, and environmental factors, such as occupation or dwelling within a 'concrete jungle'. The combined impact of these factors explains the substantial variance in human NEAT. The variability in NEAT might be viewed as random but human data contradict this perception. It appears that changes in NEAT subtly accompany experimentally-induced changes in energy balance and are important in the physiology of weight change. NEAT and sedentariness may thus be important in obesity. It then becomes intriguing to dissect mechanistic studies that delineate how NEAT is regulated by neural, peripheral and humoral factors. NEAT may be a carefully-regulated 'tank' of physical activity that is crucial for weight control.

Original languageEnglish (US)
Pages (from-to)667-679
Number of pages13
JournalProceedings of the Nutrition Society
Volume62
Issue number3
DOIs
StatePublished - Aug 2003
Externally publishedYes

Fingerprint

Thermogenesis
heat production
Weights and Measures
physical activity
thermic effect of food
energy
Biological Factors
weight control
Body Composition
sports
Occupations
Human Activities
energy expenditure
walking
energy balance
Energy Metabolism
Walking
body composition
Sports
exercise

Keywords

  • Energy expenditure
  • Malnutrition
  • Obesity
  • Physical activity

ASJC Scopus subject areas

  • Medicine (miscellaneous)
  • Food Science

Cite this

Non-exercise activity thermogenesis. / Levine, James A.

In: Proceedings of the Nutrition Society, Vol. 62, No. 3, 08.2003, p. 667-679.

Research output: Contribution to journalArticle

Levine, James A. / Non-exercise activity thermogenesis. In: Proceedings of the Nutrition Society. 2003 ; Vol. 62, No. 3. pp. 667-679.
@article{eb0e9d5ca72e43b6a8511b61a7e7769a,
title = "Non-exercise activity thermogenesis",
abstract = "Non-exercise activity thermogenesis (NEAT) is the energy expended that is not from sleeping, eating or sports-like exercise. It ranges from the energy expended walking to work, typing, performing yard work, undertaking agricultural tasks and fidgeting. NEAT can be measured by one of two approaches. The first approach is to measure or estimate total NEAT. Here, total daily energy expenditure is measured and from it is subtracted BMR + thermic effect of food. The second is the factoral approach whereby the components of NEAT are quantified and total NEAT calculated by summing these components. The amount of NEAT that human subjects perform represents the product of the amount and types of physical activities and the thermogenic cost of each activity. The factors that affect the NEAT of a human subject are readily divisible into biological factors, such as weight, gender and body composition, and environmental factors, such as occupation or dwelling within a 'concrete jungle'. The combined impact of these factors explains the substantial variance in human NEAT. The variability in NEAT might be viewed as random but human data contradict this perception. It appears that changes in NEAT subtly accompany experimentally-induced changes in energy balance and are important in the physiology of weight change. NEAT and sedentariness may thus be important in obesity. It then becomes intriguing to dissect mechanistic studies that delineate how NEAT is regulated by neural, peripheral and humoral factors. NEAT may be a carefully-regulated 'tank' of physical activity that is crucial for weight control.",
keywords = "Energy expenditure, Malnutrition, Obesity, Physical activity",
author = "Levine, {James A.}",
year = "2003",
month = "8",
doi = "10.1079/PNS2003281",
language = "English (US)",
volume = "62",
pages = "667--679",
journal = "Proceedings of the Nutrition Society",
issn = "0029-6651",
publisher = "Cambridge University Press",
number = "3",

}

TY - JOUR

T1 - Non-exercise activity thermogenesis

AU - Levine, James A.

PY - 2003/8

Y1 - 2003/8

N2 - Non-exercise activity thermogenesis (NEAT) is the energy expended that is not from sleeping, eating or sports-like exercise. It ranges from the energy expended walking to work, typing, performing yard work, undertaking agricultural tasks and fidgeting. NEAT can be measured by one of two approaches. The first approach is to measure or estimate total NEAT. Here, total daily energy expenditure is measured and from it is subtracted BMR + thermic effect of food. The second is the factoral approach whereby the components of NEAT are quantified and total NEAT calculated by summing these components. The amount of NEAT that human subjects perform represents the product of the amount and types of physical activities and the thermogenic cost of each activity. The factors that affect the NEAT of a human subject are readily divisible into biological factors, such as weight, gender and body composition, and environmental factors, such as occupation or dwelling within a 'concrete jungle'. The combined impact of these factors explains the substantial variance in human NEAT. The variability in NEAT might be viewed as random but human data contradict this perception. It appears that changes in NEAT subtly accompany experimentally-induced changes in energy balance and are important in the physiology of weight change. NEAT and sedentariness may thus be important in obesity. It then becomes intriguing to dissect mechanistic studies that delineate how NEAT is regulated by neural, peripheral and humoral factors. NEAT may be a carefully-regulated 'tank' of physical activity that is crucial for weight control.

AB - Non-exercise activity thermogenesis (NEAT) is the energy expended that is not from sleeping, eating or sports-like exercise. It ranges from the energy expended walking to work, typing, performing yard work, undertaking agricultural tasks and fidgeting. NEAT can be measured by one of two approaches. The first approach is to measure or estimate total NEAT. Here, total daily energy expenditure is measured and from it is subtracted BMR + thermic effect of food. The second is the factoral approach whereby the components of NEAT are quantified and total NEAT calculated by summing these components. The amount of NEAT that human subjects perform represents the product of the amount and types of physical activities and the thermogenic cost of each activity. The factors that affect the NEAT of a human subject are readily divisible into biological factors, such as weight, gender and body composition, and environmental factors, such as occupation or dwelling within a 'concrete jungle'. The combined impact of these factors explains the substantial variance in human NEAT. The variability in NEAT might be viewed as random but human data contradict this perception. It appears that changes in NEAT subtly accompany experimentally-induced changes in energy balance and are important in the physiology of weight change. NEAT and sedentariness may thus be important in obesity. It then becomes intriguing to dissect mechanistic studies that delineate how NEAT is regulated by neural, peripheral and humoral factors. NEAT may be a carefully-regulated 'tank' of physical activity that is crucial for weight control.

KW - Energy expenditure

KW - Malnutrition

KW - Obesity

KW - Physical activity

UR - http://www.scopus.com/inward/record.url?scp=0141857909&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0141857909&partnerID=8YFLogxK

U2 - 10.1079/PNS2003281

DO - 10.1079/PNS2003281

M3 - Article

C2 - 14692603

AN - SCOPUS:0141857909

VL - 62

SP - 667

EP - 679

JO - Proceedings of the Nutrition Society

JF - Proceedings of the Nutrition Society

SN - 0029-6651

IS - 3

ER -