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The journal of nutrition, health & aging

, Volume 15, Issue 5, pp 376–381 | Cite as

The anabolic response to resistance exercise and a protein-rich meal is not diminished by age

  • T. B. Symonsi
  • M. Sheffield-Moore
  • M. M. Mamerow
  • R. R. Wolfe
  • Douglas Paddon-JonesEmail author
Response to Exercise and Protein is Not Reduced by Age

Abstract

Objectives

The synergistic effect of resistance exercise and protein ingestion on muscle protein anabolism in young adults has been well described. However, it is unclear if this relationship is maintained in older adults who are at greater risk of sarcopenic muscle loss. To this end, we sought to determine if the synergistic response to a bout of resistance exercise and a protein-rich lean beef meal was altered by age.

Setting

The University of Texas Medical Branch, Clinical Research Center, Galveston, Texas.

Participants

Healthy young (n=7, 29±3 y) and older (n=7, 67±2 y) adults.

Design

Mixed muscle fractional synthesis rate (FSR) was calculated during a 3 h post-absorptive/rest period and again during a 5 h period following ingestion of a protein-rich meal (340 g lean beef) and bout of resistance exercise (6 sets of 8 repetitions of isotonic knee extension exercise at 80% one repetition maximum).

Measurements

Venous blood samples and vastus lateralis muscle biopsy samples were obtained during a primed (2.0 µmol/kg) constant infusion (0.08 µmol·kg−1min1) of L- [ring-13C6] phenylalanine.

Results

Mixed muscle FSR increased by approximately 108% in both young [pre: 0.073+0.008; post: 0.156±0.021 (SE) %/h, p<0.001] and older adults (pre: 0.075+0.004; post: 0.152+0.017 %/h, p=0.003) following the meal and resistance exercise bout.

Conclusion

Aging does not diminish the increase in muscle protein synthesis following a high-quality protein rich meal and bout of resistance exercise.

Key words

Nutrition stable isotopes beef sarcopenia diet 

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Copyright information

© Serdi and Springer Verlag France 2011

Authors and Affiliations

  • T. B. Symonsi
    • 1
  • M. Sheffield-Moore
    • 2
  • M. M. Mamerow
    • 1
  • R. R. Wolfe
  • Douglas Paddon-Jones
    • 1
    • 2
    • 3
    • 4
    Email author
  1. 1.Division of Rehabilitation SciencesThe University of Texas Medical Branch GalvestonTexasUSA
  2. 2.Department of Internal MedicineThe University of Texas Medical Branch GalvestonTexasUSA
  3. 3.Department of Physical TherapyThe University of Texas Medical Branch GalvestonTexasUSA
  4. 4.The University of Texas Medical BranchTexasUSA

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