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Cited by 146Muscle metabolism and nutritionNutrition and Health in AgingMuscle Physiology and Disorders

Effect of protein source on resistive-training-induced changes in body composition and muscle size in older men

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Haub, Mark D, Wells, Amanda M, Tarnopolsky, Mark A, Campbell, Wayne W·2002·The American Journal of Clinical Nutrition
DOI 10.1093/ajcn/76.3.511PMC PMC2556250
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Abstract

Background Aging is associated with reductions in muscle mass and strength, but nutrition and exercise interventions can delay this progression and enhance the quality of life.Objective We examined whether the predominant source of protein consumed by older men influenced measures of muscle size and strength, body composition, resting energy expenditure, and skeletal muscle creatine concentrations in response to 12 wk of resistive training.Design After consuming a lactoovovegetarian (LOV) diet for 2 wk, 21 men aged 65 +/- 5 y were randomly assigned to either consume a beef-containing (BC) diet (n = 10) or to continue the LOV diet (n = 11) throughout resistive training. The BC diet included 0.6 g protein. kg(-1). d(-1) from beef and the LOV diet included 0.6 g protein. kg(-1). d(-1) from textured vegetable protein (soy) sources. The remaining protein in the diets came from self-selected LOV sources.Results The mean total protein intake for both groups ranged from 1.03 to 1.17 g. kg(-1). d(-1) during the intervention. Men in both groups had improvements (14-38%) in maximal dynamic strength of all the muscle groups trained with no significant difference between groups. With resistive training, cross-sectional muscle area of the vastus lateralis increased in both groups (4.2 +/- 3.0% and 6.0 +/- 2.6% for the LOV and BC groups, respectively) with no significant difference between groups. Body composition, resting energy expenditure, and concentrations of muscle creatine, phosphocreatine, and total creatine did not differ significantly between groups or change over time.Conclusions These data suggest that increases in muscle strength and size were not influenced by the predominant source of protein consumed by older men with adequate total protein intake.

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Crossref · 10.1093/ajcn/76.3.511

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  • Greater training-induced lean mass gains were reported in participants consuming an omnivorous diet compared with a lacto-ovo-vegetarian diet at 0.78 g/kg BM/d, but these differences were no longer evident when protein intakes increased to 1.15 g/kg BM/d.

    “For instance, greater training-induced lean mass gains were reported in participants consuming an omnivorous diet compared with those consuming a lacto-ovo-vegetarian diet at 0.78 g/kg BM/d [111], but these differences were no longer evident when protein intakes increased to 1.15 g/kg BM/d [112].”

    From Nutritional Considerations for the Vegan Athlete (2023) · cites this paper as [112]

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Authors
Haub, M. D., Wells, A. M., Tarnopolsky, M. A., & Campbell, W. W.
Affiliations
Kansas State University (US)
Corresponding author
Haub, Mark D
ORCID
Venue
The American Journal of Clinical Nutrition
Publisher
Elsevier BV
Published
2002-09
Volume
76
Issue
3
Pages
511-517
ISSN
0002-9165 (ISSN-L)
DOI
10.1093/ajcn/76.3.511
PMC
PMC2556250
OpenAlex
W2096787841
Cited by
146
References
33
Citations by year
2026: 6 · 2025: 4 · 2024: 2 · 2023: 8 · 2022: 6 · 2021: 7 · 2020: 8 · 2019: 6 · 2018: 7 · 2017: 6 · 2016: 9 · 2015: 7 · 2014: 8 · 2013: 6 · 2012: 8
FWCI
1.46
Type
journal article
Language
en
Open access
Licence
Locations
  • American Journal of Clinical Nutrition (publishedVersion)
  • PubMed (publishedVersion)
  • PubMed Central (acceptedVersion)
Funders
  • National Institute on Aging (R01 AG 15750, R29AG013409, R01AG015750, R29-AG-13409)
  • National Center for Research Resources (M01 RR 14288, M01RR014288)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cell Biology › Muscle metabolism and nutrition
  • Health Sciences › Medicine › Physiology › Nutrition and Health in Aging
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Muscle Physiology and Disorders
Keywords
protein sources, older men, resistance training, body composition, muscle size, muscle strength, lacto-ovo-vegetarian diet, textured vegetable protein, beef protein, resting energy expenditure, sarcopenia, aging
MeSH terms
Aged, Aging, Animals, Basal Metabolism, Body Composition, Cattle, Dietary Proteins, Energy Metabolism, Humans, Male, Meat, Middle Aged, Diet, Vegetarian, Exercise, Muscle, Skeletal, Soybean Proteins

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