Energy expenditure of nonexercise activity

James A. Levine, Sara J. Schleusner, Michael Dennis Jensen

Research output: Contribution to journalArticle

228 Citations (Scopus)

Abstract

Background: We found recently that changes in nonexercise activity thermogenesis (NEAT) mediate resistance to weight gain with overfeeding in sedentary adults. A potentially important, yet seldom investigated, component of NEAT is the energy expenditure of fidgeting-like activities. Objective: Our goal was to measure changes in energy expenditure with fidgeting-like activities. Design: Energy expenditure was measured in 24 subjects (17 women and 7 men; x̄ ± SD body weight: 76 ± 21 kg) while recumbent at rest, sitting motionless, standing motionless, partaking of self-selected fidgeting-like movements while seated and while standing, and walking on a treadmill at 1.6, 3.2, and 4.8 km/h (1, 2, and 3 mph). Measurements were performed by using a high-precision, indirect calorimeter connected to the subject via a transparent, lightweight facemask that enabled almost unrestricted movement. Results: Compared with metabolic rate in the supine position (5.4 ± 1.5 kJ/min), energy expenditure increased while sitting motionless by 4 ± 6%, while fidgeting while seated by 54 ± 29% (P < 0.0001), while standing motionless by 13 ± 8% (P < 0.0001), while fidgeting while standing by 94 ± 38% (P < 0.0001), while walking at 1.6 km/h by 154 ± 38% (P < 0.0001), while walking at 3.2 km/h by 202 ± 45% (P < 0.0001), and while walking at 4.8 km/h by 292 ± 81% (P < 0.0001). There was a significant, positive correlation between changes in energy expenditure and body weight for fidgeting-like activities while standing (r = 0.43, P = 0.02) but not while seated. Conclusions: There is marked variance between subjects in the energy expenditure associated with self-selected fidgeting-like activities. The thermogenic potential of fidgeting-like and lowgrade activities is sufficiently great to substantively contribute to energy balance.

Original languageEnglish (US)
Pages (from-to)1451-1454
Number of pages4
JournalAmerican Journal of Clinical Nutrition
Volume72
Issue number6
StatePublished - 2000

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energy expenditure
Energy Metabolism
walking
Walking
Thermogenesis
heat production
Body Weight
overfeeding
calorimeters
body weight
Supine Position
exercise equipment
energy balance
Weight Gain
weight gain

Keywords

  • Energy expenditure
  • Fidgeting
  • Indirect calorimetry
  • NEAT
  • Nonexercise activity thermogenesis
  • Obesity

ASJC Scopus subject areas

  • Medicine (miscellaneous)
  • Food Science

Cite this

Energy expenditure of nonexercise activity. / Levine, James A.; Schleusner, Sara J.; Jensen, Michael Dennis.

In: American Journal of Clinical Nutrition, Vol. 72, No. 6, 2000, p. 1451-1454.

Research output: Contribution to journalArticle

Levine, JA, Schleusner, SJ & Jensen, MD 2000, 'Energy expenditure of nonexercise activity', American Journal of Clinical Nutrition, vol. 72, no. 6, pp. 1451-1454.
Levine, James A. ; Schleusner, Sara J. ; Jensen, Michael Dennis. / Energy expenditure of nonexercise activity. In: American Journal of Clinical Nutrition. 2000 ; Vol. 72, No. 6. pp. 1451-1454.
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abstract = "Background: We found recently that changes in nonexercise activity thermogenesis (NEAT) mediate resistance to weight gain with overfeeding in sedentary adults. A potentially important, yet seldom investigated, component of NEAT is the energy expenditure of fidgeting-like activities. Objective: Our goal was to measure changes in energy expenditure with fidgeting-like activities. Design: Energy expenditure was measured in 24 subjects (17 women and 7 men; x̄ ± SD body weight: 76 ± 21 kg) while recumbent at rest, sitting motionless, standing motionless, partaking of self-selected fidgeting-like movements while seated and while standing, and walking on a treadmill at 1.6, 3.2, and 4.8 km/h (1, 2, and 3 mph). Measurements were performed by using a high-precision, indirect calorimeter connected to the subject via a transparent, lightweight facemask that enabled almost unrestricted movement. Results: Compared with metabolic rate in the supine position (5.4 ± 1.5 kJ/min), energy expenditure increased while sitting motionless by 4 ± 6{\%}, while fidgeting while seated by 54 ± 29{\%} (P < 0.0001), while standing motionless by 13 ± 8{\%} (P < 0.0001), while fidgeting while standing by 94 ± 38{\%} (P < 0.0001), while walking at 1.6 km/h by 154 ± 38{\%} (P < 0.0001), while walking at 3.2 km/h by 202 ± 45{\%} (P < 0.0001), and while walking at 4.8 km/h by 292 ± 81{\%} (P < 0.0001). There was a significant, positive correlation between changes in energy expenditure and body weight for fidgeting-like activities while standing (r = 0.43, P = 0.02) but not while seated. Conclusions: There is marked variance between subjects in the energy expenditure associated with self-selected fidgeting-like activities. The thermogenic potential of fidgeting-like and lowgrade activities is sufficiently great to substantively contribute to energy balance.",
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KW - Nonexercise activity thermogenesis

KW - Obesity

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