Cited by 138Muscle metabolism and nutritionMuscle Physiology and DisordersNutrition and Health in Aging

Skeletal muscle responses to negative energy balance: Effects of dietary protein

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Carbone, John W., McClung, James P., Pasiakos, Stefan M.·2012·Advances in Nutrition

Abstract

Sustained periods of negative energy balance decrease body mass due to losses of both fat and skeletal muscle mass. Decreases in skeletal muscle mass are associated with a myriad of negative consequences, including suppressed basal metabolic rate, decreased protein turnover, decreased physical performance, and increased risk of injury. Decreases in skeletal muscle mass in response to negative energy balance are due to imbalanced rates of muscle protein synthesis and degradation. However, the underlying physiological mechanisms contributing to the loss of skeletal muscle during energy deprivation are not well described. Recent studies have demonstrated that consuming dietary protein at levels above the current recommended dietary allowance (0.8 g · kg(-1) · d(-1)) may attenuate the loss of skeletal muscle mass by affecting the intracellular regulation of muscle anabolism and proteolysis. However, the specific mechanism by which increased dietary protein spares skeletal muscle through enhanced molecular control of muscle protein metabolism has not been elucidated. This article reviews the available literature related to the effects of negative energy balance on skeletal muscle mass, highlighting investigations that assessed the influence of varying levels of dietary protein on skeletal muscle protein metabolism. Further, the molecular mechanisms that may contribute to the regulation of skeletal muscle mass in response to negative energy balance and alterations in dietary protein level are described.

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Crossref · 10.3945/an.111.001792

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  • In response to sustained NEB, there is a downregulation of whole-body protein turnover including SM protein synthesis in the early stages, probably to conserve energy and protein reserves.

    “in response to sustained NEB, there is a downregulation of whole-body protein turnover including SM protein synthesis in the early stages, probably to conserve energy and protein reserves [85].”

    From Optimised Skeletal Muscle Mass as a Key Strategy for Obesity Management (2025) · cites this paper as [85]

    The passages on whole-body protein turnover report decreases during sustained energy deficit, and the muscle-synthesis passage suggests a decrease in the early stages of negative energy balance. The claim states these responses more definitively than the review does and omits its qualification that the whole-body finding may depend on dietary protein intake being at the recommended level. No page numbers are provided in our copy. (LLM, conf=0.82)

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  • Loss of SM mass has a negative impact on metabolic processes (including downregulation of protein turnover and basal metabolic rate (BMR) and worsening IR), physical performance, SM function, and susceptibility to physical injury.

    “Such a loss of SM mass has a negative impact on metabolic processes (including a downregulation of protein turnover and BMR and a worsening IR), physical performance, SM function, and susceptibility to physical injury [85].”

    From Optimised Skeletal Muscle Mass as a Key Strategy for Obesity Management (2025) · cites this paper as [85]

    The Introduction links skeletal muscle loss to reduced protein turnover and basal metabolic rate, poorer muscular function and physical performance, and greater susceptibility to injury. The paper does not say that muscle loss worsens insulin resistance; its discussion of insulin concerns a possible mechanism of muscle proteolysis during negative energy balance. (LLM, conf=0.88)

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  • Acute periods of NEB result in an increase in whole-body proteolysis, amino acid (AA) oxidation, and nitrogen excretion.

    “Acute periods of NEB result in an increase in whole-body proteolysis, AA oxidation, and nitrogen excretion [85].”

    From Optimised Skeletal Muscle Mass as a Key Strategy for Obesity Management (2025) · cites this paper as [85]

    The passage discussing whole-body protein turnover (section label rendered '$d 21 ).)'; page not provided) states that acute negative energy balance associated with fasting increases all three measures. The citing sentence omits the fasting qualification, extending the statement to acute negative energy balance generally. (LLM, conf=0.84)

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  • In that study, there was a lower reduction in FFM (17.3%) for women consuming a HPD compared to those on a low-protein diet (FFM loss of 37.5%).

    “there was a lower reduction in FFM (17.3%) for those women consuming a HPD compared to those on a low-protein diet (FFM loss of 37.5%) [85,106].”

    From Optimised Skeletal Muscle Mass as a Key Strategy for Obesity Management (2025) · cites this paper as [85]

    The discussion of negative energy balance and dietary protein intake (passage 1; page not supplied) reports the 17.3% and 37.5% figures for women on high- and low-protein diets. But these are the percentages of total weight loss attributable to FFM loss, not percentage reductions in FFM itself as the citing sentence suggests. (LLM, conf=0.88)

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  • One key lifestyle approach to mitigate against the diminishment of SM mass and function is a nutritional strategy to ensure the provision of a high-protein diet (HPD): a diet with protein intake in excess of the usual recommended dietary allowance (0.8 g/kg/day).

    “One key lifestyle approach to mitigate against the diminishment of SM mass and function is a nutritional strategy to ensure the provision of a HPD: a diet that consists of a protein intake in excess of the usual recommended dietary allowance (0.8 g kg−1 day−1) [85].”

    From Optimised Skeletal Muscle Mass as a Key Strategy for Obesity Management (2025) · cites this paper as [85]

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Cites

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Research works printed but not linked: 3

  1. [11]11. Gordon MM, Bopp MJ, Easter L, Miller GD, Lyles MF, Houston DK, Nicklas BJ, Kritchevsky SB. Effects of dietary protein on the composi- tion of weight loss in post-menopausal women. J Nutr Health Aging. 2008;12:505-9.
  2. [27]27. Rennie MJ, Tipton KD. Protein and amino acid metabolism during and after exercise and the effects of nutrition. Annu Rev Nutr. 2000;20:457-83.
  3. [29]29. Pasiakos SM, McClung JP. Supplemental dietary leucine and the skeletal muscle anabolic response to essential amino acids. Nutr Rev. 2011;69: 550-7.

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Authors
Carbone, J. W., McClung, J. P., & Pasiakos, S. M.
Affiliations
  • Eastern Michigan University (US)
  • U.S. Army Research Institute of Environmental Medicine (US)
Corresponding author
Pasiakos, Stefan M.
Venue
Advances in Nutrition
Publisher
Elsevier BV
Published
2012-03
Volume
3
Issue
2
Pages
119-126
ISSN
  • 2156-5376 (ISSN-L)
  • 2161-8313
OpenAlex
W2118596934
Cited by
138
References
74
Citations by year
2026: 8 · 2025: 11 · 2024: 8 · 2023: 8 · 2022: 7 · 2021: 16 · 2020: 7 · 2019: 13 · 2018: 4 · 2017: 12 · 2016: 14 · 2015: 6 · 2014: 14 · 2013: 10
FWCI
0.88
Type
journal article
Language
en
Open access
Locations
  • Advances in Nutrition (publishedVersion)
  • Europe PMC (PubMed Central) (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cell Biology › Muscle metabolism and nutrition
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Muscle Physiology and Disorders
  • Health Sciences › Medicine › Physiology › Nutrition and Health in Aging
Keywords
negative energy balance, skeletal muscle mass, dietary protein, muscle protein synthesis, muscle protein degradation, muscle anabolism, energy deprivation, muscle atrophy, protein turnover
MeSH terms
Animals, Basal Metabolism, Body Weight, Energy Intake, Dietary Proteins, Energy Metabolism, Female, Humans, Leucine, Male, Muscle Proteins, Nitrogen, Muscle, Skeletal, Nutrition Policy, Rats

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