Protein supplementation does not affect myogenic adaptations to resistance training

Paul T. Reidy, Christopher Fry, Sherry Igbinigie, Rachel Deer, Kristofer Jennings, Mark B. Cope, Ratna Mukherjea, Elena Volpi, Blake Rasmussen

Research output: Contribution to journalArticle

14 Citations (Scopus)

Abstract

It has been proposed that protein supplementation during resistance exercise training enhances muscle hypertrophy. The degree of hypertrophy during training is controlled in part through the activation of satellite cells and myonuclear accretion. Purpose: This study aimed to determine the efficacy of protein supplementation (and the type of protein) during traditional resistance training on myofiber cross-sectional area, satellite cell content, and myonuclear addition. Methods: Healthy young men participated in supervised whole-body progressive resistance training 3 dIwkj1 for 12 wk. Participants were randomized to one of three groups ingesting a daily 22-g macronutrient dose of soy-dairy protein blend (PB, n = 22), whey protein isolate (WP, n = 15), or an isocaloric maltodextrin placebo (MDP, n = 17). Lean mass, vastus lateralis myofiber-type-specific cross-sectional area, satellite cell content, and myonuclear addition were assessed before and after resistance training. Results: PB and the pooled protein treatments (PB + WP = PRO) exhibited a greater whole-body lean mass %change compared with MDP (P = 0.057 for PB) and (P = 0.050 for PRO), respectively. All treatments demonstrated similar leg muscle hypertrophy and vastus lateralis myofiber-type-specific cross-sectional area (P G 0.05). Increases in myosin heavy chain I and II myofiber satellite cell content and myonuclei content were also detected after exercise training (P G 0.05). Conclusion: Protein supplementation during resistance training has a modest effect on whole-body lean mass as compared with exercise training without protein supplementation, and there was no effect on any outcome between protein supplement types (blend vs whey). However, protein supplementation did not enhance resistance exercise-induced increases in myofiber hypertrophy, satellite cell content, or myonuclear addition in young healthy men. We propose that as long as protein intake is adequate during muscle overload, the adaptations in muscle growth and function will not be influenced by protein supplementation.

Original languageEnglish (US)
Pages (from-to)1197-1208
Number of pages12
JournalMedicine and Science in Sports and Exercise
Volume49
Issue number6
DOIs
StatePublished - 2017

Fingerprint

Resistance Training
Proteins
Hypertrophy
Exercise
Muscles
Quadriceps Muscle
Soybean Proteins
Myosin Heavy Chains
Leg
Placebos

Keywords

  • Exercise
  • Hypertrophy
  • Muscle
  • Myofiber
  • Protein type
  • Resistance
  • Soy
  • Training
  • Whey

ASJC Scopus subject areas

  • Orthopedics and Sports Medicine
  • Physical Therapy, Sports Therapy and Rehabilitation

Cite this

Protein supplementation does not affect myogenic adaptations to resistance training. / Reidy, Paul T.; Fry, Christopher; Igbinigie, Sherry; Deer, Rachel; Jennings, Kristofer; Cope, Mark B.; Mukherjea, Ratna; Volpi, Elena; Rasmussen, Blake.

In: Medicine and Science in Sports and Exercise, Vol. 49, No. 6, 2017, p. 1197-1208.

Research output: Contribution to journalArticle

Reidy, Paul T. ; Fry, Christopher ; Igbinigie, Sherry ; Deer, Rachel ; Jennings, Kristofer ; Cope, Mark B. ; Mukherjea, Ratna ; Volpi, Elena ; Rasmussen, Blake. / Protein supplementation does not affect myogenic adaptations to resistance training. In: Medicine and Science in Sports and Exercise. 2017 ; Vol. 49, No. 6. pp. 1197-1208.
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abstract = "It has been proposed that protein supplementation during resistance exercise training enhances muscle hypertrophy. The degree of hypertrophy during training is controlled in part through the activation of satellite cells and myonuclear accretion. Purpose: This study aimed to determine the efficacy of protein supplementation (and the type of protein) during traditional resistance training on myofiber cross-sectional area, satellite cell content, and myonuclear addition. Methods: Healthy young men participated in supervised whole-body progressive resistance training 3 dIwkj1 for 12 wk. Participants were randomized to one of three groups ingesting a daily 22-g macronutrient dose of soy-dairy protein blend (PB, n = 22), whey protein isolate (WP, n = 15), or an isocaloric maltodextrin placebo (MDP, n = 17). Lean mass, vastus lateralis myofiber-type-specific cross-sectional area, satellite cell content, and myonuclear addition were assessed before and after resistance training. Results: PB and the pooled protein treatments (PB + WP = PRO) exhibited a greater whole-body lean mass {\%}change compared with MDP (P = 0.057 for PB) and (P = 0.050 for PRO), respectively. All treatments demonstrated similar leg muscle hypertrophy and vastus lateralis myofiber-type-specific cross-sectional area (P G 0.05). Increases in myosin heavy chain I and II myofiber satellite cell content and myonuclei content were also detected after exercise training (P G 0.05). Conclusion: Protein supplementation during resistance training has a modest effect on whole-body lean mass as compared with exercise training without protein supplementation, and there was no effect on any outcome between protein supplement types (blend vs whey). However, protein supplementation did not enhance resistance exercise-induced increases in myofiber hypertrophy, satellite cell content, or myonuclear addition in young healthy men. We propose that as long as protein intake is adequate during muscle overload, the adaptations in muscle growth and function will not be influenced by protein supplementation.",
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AU - Reidy, Paul T.

AU - Fry, Christopher

AU - Igbinigie, Sherry

AU - Deer, Rachel

AU - Jennings, Kristofer

AU - Cope, Mark B.

AU - Mukherjea, Ratna

AU - Volpi, Elena

AU - Rasmussen, Blake

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AB - It has been proposed that protein supplementation during resistance exercise training enhances muscle hypertrophy. The degree of hypertrophy during training is controlled in part through the activation of satellite cells and myonuclear accretion. Purpose: This study aimed to determine the efficacy of protein supplementation (and the type of protein) during traditional resistance training on myofiber cross-sectional area, satellite cell content, and myonuclear addition. Methods: Healthy young men participated in supervised whole-body progressive resistance training 3 dIwkj1 for 12 wk. Participants were randomized to one of three groups ingesting a daily 22-g macronutrient dose of soy-dairy protein blend (PB, n = 22), whey protein isolate (WP, n = 15), or an isocaloric maltodextrin placebo (MDP, n = 17). Lean mass, vastus lateralis myofiber-type-specific cross-sectional area, satellite cell content, and myonuclear addition were assessed before and after resistance training. Results: PB and the pooled protein treatments (PB + WP = PRO) exhibited a greater whole-body lean mass %change compared with MDP (P = 0.057 for PB) and (P = 0.050 for PRO), respectively. All treatments demonstrated similar leg muscle hypertrophy and vastus lateralis myofiber-type-specific cross-sectional area (P G 0.05). Increases in myosin heavy chain I and II myofiber satellite cell content and myonuclei content were also detected after exercise training (P G 0.05). Conclusion: Protein supplementation during resistance training has a modest effect on whole-body lean mass as compared with exercise training without protein supplementation, and there was no effect on any outcome between protein supplement types (blend vs whey). However, protein supplementation did not enhance resistance exercise-induced increases in myofiber hypertrophy, satellite cell content, or myonuclear addition in young healthy men. We propose that as long as protein intake is adequate during muscle overload, the adaptations in muscle growth and function will not be influenced by protein supplementation.

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