Cited by 96Cardiovascular and exercise physiologyPhysical Activity and HealthObesity, Physical Activity, Diet

Caloric Restriction with or without Exercise: The Fitness versus Fatness Debate

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LARSON-MEYER, D. ENETTE, REDMAN, LEANNE, HEILBRONN, LEONIE K., MARTIN, CORBY K., RAVUSSIN, ERIC·2010·Medicine & Science in Sports & Exercise

Abstract

UNLABELLED: There is a debate over the independent effects of aerobic fitness and body fatness on mortality and disease risks. PURPOSE: To determine whether a 25% energy deficit that produces equal change in body fatness leads to greater cardiometabolic benefits when aerobic exercise is included. METHODS: Thirty-six overweight participants (16 males/20 females) (39 +/- 1 yr; 82 +/- 2 kg; body mass index = 27.8 +/- 0.3 kg x m2, mean +/- SEM) were randomized to one of three groups (n = 12 for each) for a 6-month intervention: control (CO, weight-maintenance diet), caloric restriction (CR, 25% reduction in energy intake), or caloric restriction plus aerobic exercise (CR + EX, 12.5% reduction in energy intake plus 12.5% increase in exercise energy expenditure). Food was provided during weeks 1-12 and 22-24. Changes in fat mass, visceral fat, VO2peak (graded treadmill test), muscular strength (isokinetic knee extension/flexion), blood lipids, blood pressure, and insulin sensitivity/secretion were compared. RESULTS: As expected, VO2peak was significantly improved after 6 months of intervention in CR + EX only (22 +/- 5% vs 7 +/- 5% in CR and -5 +/- 3% in CO), whereas isokinetic muscular strength did not change. There was no difference in the losses of weight, fat mass, or visceral fat and changes in systolic blood pressure (BP) between the intervention groups. However, only CR + EX had a significant decrease in diastolic BP (-5 +/- 3% vs -2 +/- 2% in CR and -1 +/- 2% in CO), in low-density lipoprotein (LDL) cholesterol (-13 +/- 4% vs -6 +/- 3% in CR and 2 +/- 4% in CO), and a significant increase in insulin sensitivity (66 +/- 22% vs 40 +/- 20% in CR and 1 +/- 11% in CO). CONCLUSIONS: Despite similar effect on fat losses, combining CR with exercise increased aerobic fitness in parallel with improved insulin sensitivity, LDL cholesterol, and diastolic BP. The results lend support for inclusion of an exercise component in weight loss programs to improve metabolic fitness.

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Authors
LARSON-MEYER, D. E., REDMAN, L., HEILBRONN, L. K., MARTIN, C. K., & RAVUSSIN, E.
Affiliations
  • Pennington Biomedical Research Center (US)
  • Garvan Institute of Medical Research (AU)
Venue
Medicine & Science in Sports & Exercise
Published
2010-01
Volume
42
Issue
1
Pages
152-159
ISSN
0195-9131 (ISSN-L)
OpenAlex
W2051432015
Cited by
96
References
40
Citations by year
2026: 2 · 2025: 5 · 2024: 3 · 2023: 2 · 2022: 4 · 2021: 5 · 2020: 4 · 2019: 5 · 2018: 7 · 2016: 10 · 2015: 3 · 2014: 7 · 2013: 7 · 2012: 11
FWCI
26.16
Type
journal article
Language
en
Open access
Locations
  • Medicine & Science in Sports & Exercise (publishedVersion)
  • PubMed (publishedVersion)
  • PubMed Central (acceptedVersion)
  • Civil War Book Review (submittedVersion)
  • Adelaide Research & Scholarship (AR&S) (University of Adelaide) (submittedVersion)
Funders
  • National Institutes of Health (5k23dk068052-04)
  • National Institute on Aging (U01AG020478, U01-AG20478)
  • National Institute of Diabetes and Digestive and Kidney Diseases (K23-DK-068052, K01DK062018)
Topics
  • Health Sciences › Medicine › Complementary and alternative medicine › Cardiovascular and exercise physiology
  • Health Sciences › Medicine › Physiology › Physical Activity and Health
  • Health Sciences › Medicine › Public Health, Environmental and Occupational Health › Obesity, Physical Activity, Diet
Keywords
caloric restriction, aerobic exercise, negative energy balance, overweight, weight loss, cardiorespiratory fitness, peak oxygen uptake, insulin sensitivity, LDL cholesterol, blood pressure, visceral fat, fat mass, isokinetic strength, cardiometabolic health, metabolic fitness
MeSH terms
Adult, Analysis of Variance, Body Composition, Energy Metabolism, Female, Humans, Lipids, Male, Middle Aged, Oxygen Consumption, Physical Fitness, Weight Loss, Exercise, Treatment Outcome, Caloric Restriction, Overweight, Muscle Strength

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