Cited by 91Dietary Effects on HealthRegulation of Appetite and ObesityDiet, Metabolism, and Disease

Changes in energy metabolism in response to 48 h of overfeeding and fasting in Caucasians and Pima Indians

Weyer, C, Vozarova, B, Ravussin, E, Tataranni, PA·2001·International Journal of Obesity

Abstract

Objective Differences in the metabolic response to overfeeding and starvation may confer susceptibility or resistance to obesity in humans. To further examine this hypothesis, we assessed the changes in 24 h energy metabolism in response to short-term overfeeding and fasting in Caucasians (C) and Pima Indians (I), a population with a very high propensity for obesity.Methods We measured the changes in 24 h energy expenditure (24 -EE) and 24 h respiratory quotient (24-RQ) in response to 48 h of mixed diet overfeeding (100% above energy requirements) and fasting in a whole body respiratory chamber in 14 male subjects (7 C/7 I, age 30+/-6 y, mean+/-s.d.). Results were compared to a 24 h measurement under eucaloric conditions.Results Mean 24-EE increased in response to overfeeding and decreased in response to fasting (all changes P<0.01), with no differences between C (+9.1% and -9.1%) and I (+8.6% and -9.6%). Similarly, mean 24-RQ increased/decreased in response to overfeeding/fasting, respectively (all changes P<0.01), again with no differences between C (+0.06 and -0.05) and I (+0.05 and -0.05). The changes in 24-EE in response to overfeeding and fasting were positively correlated (r=0.70, P<0.01), whereas those in 24-RQ were not (r=0.40, NS).Conclusions Pima Indians do not appear to have an impaired metabolic response to short-term overfeeding and fasting that could explain their propensity for obesity. Individuals with a large increase in energy expenditure in response to overfeeding appear to have a small decrease in energy expenditure in response to starvation (spendthrift phenotype) and vice versa (thrifty phenotype).

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Crossref · 10.1038/sj.ijo.0801610

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  • Both controlled studies suggest similar metabolic flexibility to carbohydrate-enriched diets in obese and lean individuals.

    “Both studies suggest similar metabolic flexibility to carbohydrate- enriched diets in obese and lean individuals.”

    From Metabolic flexibility and insulin resistance (2008) · cites this paper as [64]

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Authors
Weyer, C., Vozarova, B., Ravussin, E., & Tataranni, P.
Affiliations
National Institutes of Health (US)
Corresponding author
Weyer, C
Venue
International Journal of Obesity
Published
2001-05
Volume
25
Issue
5
Pages
593-600
ISSN
  • 0307-0565 (ISSN-L)
  • 1476-5497
OpenAlex
W2314890057
Cited by
91
References
37
Citations by year
2026: 1 · 2025: 5 · 2024: 4 · 2023: 7 · 2022: 5 · 2021: 6 · 2020: 6 · 2019: 9 · 2018: 5 · 2017: 3 · 2016: 3 · 2015: 5 · 2014: 2 · 2013: 4 · 2012: 4
FWCI
0.60
Type
journal article
Language
en
Open access
closed
Locations
  • International Journal of Obesity (publishedVersion)
  • PubMed (publishedVersion)
  • Research at the University of Copenhagen (University of Copenhagen) (submittedVersion)
Topics
  • Health Sciences › Medicine › Physiology › Dietary Effects on Health
  • Life Sciences › Neuroscience › Endocrine and Autonomic Systems › Regulation of Appetite and Obesity
  • Health Sciences › Medicine › Endocrinology, Diabetes and Metabolism › Diet, Metabolism, and Disease
Keywords
energy metabolism, overfeeding, fasting, energy expenditure, respiratory quotient, Pima Indians, obesity susceptibility, thrifty phenotype, ethnic differences
MeSH terms
Adult, Arizona, Basal Metabolism, Eating, Energy Metabolism, Fasting, Humans, Indians, North American, Male, Obesity, Oxygen Consumption, Time Factors, White People, Asian People

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