Cited by 186Muscle metabolism and nutritionMuscle Physiology and DisordersNutrition and Health in Aging

Nutritional regulation of muscle protein synthesis with resistance exercise: strategies to enhance anabolism

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Churchward-Venne, Tyler A, Burd, Nicholas A, Phillips, Stuart M·2012·Nutrition & Metabolism

Abstract

Provision of dietary amino acids increases skeletal muscle protein synthesis (MPS), an effect that is enhanced by prior resistance exercise. As a fundamentally necessary process in the enhancement of muscle mass, strategies to enhance rates of MPS would be beneficial in the development of interventions aimed at increasing skeletal muscle mass particularly when combined with chronic resistance exercise. The purpose of this review article is to provide an update on current findings regarding the nutritional regulation of MPS and highlight nutrition based strategies that may serve to maximize skeletal muscle protein anabolism with resistance exercise. Such factors include timing of protein intake, dietary protein type, the role of leucine as a key anabolic amino acid, and the impact of other macronutrients (i.e. carbohydrate) on the regulation of MPS after resistance exercise. We contend that nutritional strategies that serve to maximally stimulate MPS may be useful in the development of nutrition and exercise based interventions aimed at enhancing skeletal muscle mass which may be of interest to elderly populations and to athletes.

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Crossref · 10.1186/1743-7075-9-40

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  • The optimal dose of protein for post-exercise recovery is 20-40 g of high-quality protein consumed after exercise, which maximizes MPS rates for several hours (3-4 h), with the exact dose dependent on muscle mass involved during exercise.

    “research suggesting that 20–40 g of high-quality protein consumed after exercise maximizes MPS rates for several hours (i.e., 3–4 h), the exact dose dependent on muscle mass involved during exercise [56–58]”

    From Nutritional Strategies to Improve Post-exercise Recovery and Subsequent Exercise Performance: A Narrative Review (2025) · cites this paper as [56]

    The Conclusions (page unavailable) recommend about 20–25 g of rapidly absorbed protein to maximize post-exercise MPS in young healthy individuals. The ‘Leucine as a nutrient signal’ section (page unavailable) reports that 40 g did not increase MPS beyond 20 g in young men; it does not establish a 20–40 g optimal range or make the dose dependent on muscle mass exercised. The ‘window of anabolic potential’ section says the amino-acid-mediated increase lasts a few hours at most, but does not establish the stated 3–4-hour duration. (LLM, conf=0.89)

    Experimental — accuracy not yet measured
  • The true biological bottleneck is not simply activating Pol I once, but sustaining activation across multiple microcycles to permit slow accumulation of mature 80S ribosomes within the expanding sarcoplasm.

    “The true biological bottleneck is not simply activating Pol I once, but sustaining this activation across multiple microcycles to permit the slow, steady accumulation of mature 80S ribosomes within the expanding sarcoplasm [91,92].”

    From Ribosome Biogenesis as a Putative Bottleneck to Skeletal Muscle Hypertrophy: Mechanisms, Human Evidence, and Practical Modulators (2026) · cites this paper as [92]

    The section on mechanisms underpinning skeletal-muscle sensitivity discusses mTORC1 signaling and muscle protein synthesis, while the section on the anabolic window describes elevated protein synthesis for at least 24 hours. Neither addresses Pol I activation across microcycles or the accumulation of mature 80S ribosomes. Searches for those terms in our full-text copy found no supporting passage; page numbers were not available. (LLM, conf=0.76)

    Experimental — accuracy not yet measured
  • Resistance exercise builds muscle mass by increasing the remodelling of muscle proteins and by sensitising the skeletal muscle protein synthesis machinery to subsequent meals.

    “Resistance exercise builds muscle mass by increasing the remodelling of muscle proteins and by sensitising the skeletal muscle protein synthesis machinery to subsequent meals [83].”

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Authors
Churchward-Venne, T. A., Burd, N. A., & Phillips, S. M.
Affiliations
McMaster University (CA)
Corresponding author
Phillips, Stuart M
Venue
Nutrition & Metabolism
Published
2012-05-17
Volume
9
Issue
1
Pages
40-40
ISSN
1743-7075 (ISSN-L)
OpenAlex
W2096882143
Cited by
186
References
93
Citations by year
2026: 16 · 2025: 11 · 2024: 12 · 2023: 8 · 2022: 9 · 2021: 10 · 2020: 8 · 2019: 15 · 2018: 14 · 2017: 17 · 2016: 22 · 2015: 12 · 2014: 12 · 2013: 20
FWCI
6.67
Type
journal article
Language
en
Open access
Licence
cc-by
Locations
  • Nutrition & Metabolism (publishedVersion, cc-by)
  • Europe PMC (PubMed Central) (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion)
Funders
  • Canadian Institutes of Health Research
  • Natural Sciences and Engineering Research Council of Canada
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
muscle protein synthesis, resistance training, dietary amino acids, protein timing, leucine, carbohydrates, skeletal muscle anabolism, muscle mass, older adults, athletes

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