Cited by 754Nutrition and Health in AgingFrailty in Older AdultsPhysical Activity and Health

Aerobic or Resistance Exercise, or Both, in Dieting Obese Older Adults

Open access
Villareal, Dennis T., Aguirre, Lina, Gurney, A. Burke, Waters, Debra L., Sinacore, David R., Colombo, Elizabeth, Armamento-Villareal, Reina, Qualls, Clifford·2017·New England Journal of Medicine

Abstract

BACKGROUND: Obesity causes frailty in older adults; however, weight loss might accelerate age-related loss of muscle and bone mass and resultant sarcopenia and osteopenia. METHODS: In this clinical trial involving 160 obese older adults, we evaluated the effectiveness of several exercise modes in reversing frailty and preventing reduction in muscle and bone mass induced by weight loss. Participants were randomly assigned to a weight-management program plus one of three exercise programs - aerobic training, resistance training, or combined aerobic and resistance training - or to a control group (no weight-management or exercise program). The primary outcome was the change in Physical Performance Test score from baseline to 6 months (scores range from 0 to 36 points; higher scores indicate better performance). Secondary outcomes included changes in other frailty measures, body composition, bone mineral density, and physical functions. RESULTS: A total of 141 participants completed the study. The Physical Performance Test score increased more in the combination group than in the aerobic and resistance groups (27.9 to 33.4 points [21% increase] vs. 29.3 to 33.2 points [14% increase] and 28.8 to 32.7 points [14% increase], respectively; P=0.01 and P=0.02 after Bonferroni correction); the scores increased more in all exercise groups than in the control group (P<0.001 for between-group comparisons). Peak oxygen consumption (milliliters per kilogram of body weight per minute) increased more in the combination and aerobic groups (17.2 to 20.3 [17% increase] and 17.6 to 20.9 [18% increase], respectively) than in the resistance group (17.0 to 18.3 [8% increase]) (P<0.001 for both comparisons). Strength increased more in the combination and resistance groups (272 to 320 kg [18% increase] and 288 to 337 kg [19% increase], respectively) than in the aerobic group (265 to 270 kg [4% increase]) (P<0.001 for both comparisons). Body weight decreased by 9% in all exercise groups but did not change significantly in the control group. Lean mass decreased less in the combination and resistance groups than in the aerobic group (56.5 to 54.8 kg [3% decrease] and 58.1 to 57.1 kg [2% decrease], respectively, vs. 55.0 to 52.3 kg [5% decrease]), as did bone mineral density at the total hip (grams per square centimeter; 1.010 to 0.996 [1% decrease] and 1.047 to 1.041 [0.5% decrease], respectively, vs. 1.018 to 0.991 [3% decrease]) (P<0.05 for all comparisons). Exercise-related adverse events included musculoskeletal injuries. CONCLUSIONS: Of the methods tested, weight loss plus combined aerobic and resistance exercise was the most effective in improving functional status of obese older adults. (Funded by the National Institutes of Health; LITOE ClinicalTrials.gov number, NCT01065636 .).

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  • Acute calorie restriction can downregulate muscle protein synthesis and increase proteolysis, contributing to reduced muscle mass.

    “Energy deficits created by acute calorie restriction could downregulate muscle protein synthesis and increase proteolysis, which contributes to reduced muscle mass247,253,254”

    From Sarcopenic obesity in older adults: aetiology, epidemiology and treatment strategies (2018) · cites this paper as [247]

    The Results (Body Composition; page not available in our copy) report decreased lean mass during the six-month weight-loss intervention, supporting the reduced-mass portion of the claim. The Methods describe a sustained dietary energy deficit, but the paper does not report whether acute calorie restriction downregulates muscle protein synthesis or increases proteolysis. (LLM, conf=0.88)

    Experimental — accuracy not yet measured
  • Strategies that optimize protein anabolism during weight loss, such as consumption before exercise or spreading out protein during the day, can prevent weight loss-induced sarcopenia.

    “Strategies that optimize protein anabolism during weight loss, such as consumption before exercise or spreading out of protein during the day, can prevent weight loss-induced sarcopenia247,250.”

    From Sarcopenic obesity in older adults: aetiology, epidemiology and treatment strategies (2018) · cites this paper as [247]

    The Discussion (page not provided) suggests improving the efficiency of protein intake as a possible future strategy to preserve lean mass during weight loss. It does not mention protein consumption before exercise or distributing protein across the day, and reports that lean-mass loss was attenuated, not prevented. (LLM, conf=0.88)

    Experimental — accuracy not yet measured
  • Resistance training and aerobic training have complementary benefits, and combining both during calorie restriction gives the best body composition and physical function outcomes.

    “The individual benefits of RT and AT are complementary, and combining both exercise training modalities during CR provides the most optimal benefits for body composition and physical function.”

    From The Benefits of Exercise Training in Combination With Weight Loss Therapies (2025) · cites this paper as [22]

    The Discussion reports complementary effects of aerobic and resistance training and the greatest improvement in physical function with combined training during weight loss in obese older adults. But the Results (Body Composition; Bone Mineral Density, pages not available) do not establish that the combination produced the best body-composition outcomes: resistance training alone preserved more lean mass and better prevented hip bone-density loss. (LLM, conf=0.89)

    Experimental — accuracy not yet measured
  • In that trial, one-repetition maximum muscle strength increased similarly in resistance training (17%) and combination training (17%), while it was only maintained in aerobic training.

    “Muscle strength assessed according to an individual's one-repetition maximum (referred to as one-rep max or 1RM) also increased similarly in RT (17%) and CT (17%), while it was only maintained in AT.”

    From The Benefits of Exercise Training in Combination With Weight Loss Therapies (2025) · cites this paper as [22]

    The Results section (Strength, Balance, Gait, and Quality of Life; page not supplied) reports that one-repetition maximum strength rose in the resistance and combination groups and was maintained in the aerobic group. The reported increases were 19% and 18%, respectively, not 17% in both groups. (LLM, conf=0.92)

    Experimental — accuracy not yet measured
  • In that trial, dynamic balance evaluated by obstacle course completion time and gait speed improved more with combination training than with aerobic or resistance training.

    “Additionally, dynamic balance, evaluated with the obstacle course completion time and gait speed, improved more with CT than with AT or RT.”

    From The Benefits of Exercise Training in Combination With Weight Loss Therapies (2025) · cites this paper as [22]

    The Results section (page not provided) reports greater improvement in obstacle-course time and gait speed with combination training than with aerobic training. It does not report those comparisons against resistance training. The Methods section (page not provided) also defines dynamic balance by obstacle-course time, while assessing gait speed separately. (LLM, conf=0.87)

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Authors
Villareal, D. T., Aguirre, L., Gurney, A. B., Waters, D. L., Sinacore, D. R., Colombo, E., Armamento-Villareal, R., & Qualls, C.
Affiliations
Michael E. DeBakey VA Medical Center (US)
Venue
New England Journal of Medicine
Published
2017-05-18
Volume
376
Issue
20
Pages
1943-1955
ISSN
  • 0028-4793 (ISSN-L)
  • 1533-4406
OpenAlex
W2615792377
Cited by
754
References
38
Citations by year
2026: 103 · 2025: 79 · 2024: 74 · 2023: 87 · 2022: 98 · 2021: 116 · 2020: 56 · 2019: 61 · 2018: 60 · 2017: 19 · 2016: 1
FWCI
39.64
Type
journal article
Language
en
Open access
Locations
  • New England Journal of Medicine (publishedVersion)
  • PubMed (publishedVersion)
  • Europe PMC (PubMed Central) (acceptedVersion)
  • PubMed Central (acceptedVersion)
Funders
  • National Institutes of Health (UL1TR000041, UL1TR001449)
  • National Institute on Aging (R01AG031176)
  • National Institute of Diabetes and Digestive and Kidney Diseases (P30DK056341, P30DK020579)
  • National Center for Advancing Translational Sciences
Topics
  • Health Sciences › Medicine › Physiology › Nutrition and Health in Aging
  • Health Sciences › Medicine › Geriatrics and Gerontology › Frailty in Older Adults
  • Health Sciences › Medicine › Physiology › Physical Activity and Health
Keywords
aerobic exercise, resistance training, concurrent training, obesity, older adults, weight loss, frailty, sarcopenia, osteopenia, bone mineral density, lean body mass, muscle strength, physical performance, peak oxygen uptake, dieting, exercise intervention, body composition, bone loss prevention, weight management interventions, physical performance tests
MeSH terms
Aged, Body Composition, Combined Modality Therapy, Exercise Therapy, Female, Humans, Male, Obesity, Oxygen Consumption, Weight Loss, Exercise, Bone Density, Single-Blind Method, Frail Elderly, Resistance Training

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