Impact of caffeine and protein on postexercise muscle glycogen synthesis

Journal article


Beelen, Milou, Van Kranenburg, Janneau, Senden, Joan M., Kuipers, Harm, Van Loon, Luc J.C. and Yates, . (2012). Impact of caffeine and protein on postexercise muscle glycogen synthesis. Medicine and Science in Sports and Exercise. 44(4), pp. 692 - 700. https://doi.org/10.1249/MSS.0b013e31823a40ef
AuthorsBeelen, Milou, Van Kranenburg, Janneau, Senden, Joan M., Kuipers, Harm, Van Loon, Luc J.C. and Yates,
Abstract

BEELEN, M., J. VAN KRANENBURG, J. M. SENDEN, H. KUIPERS, and L. J. C. VAN LOON. Impact of Caffeine and Protein on Postexercise Muscle Glycogen Synthesis. Med. Sci. Sports Exerc., Vol. 44, No. 4, pp. 692–700, 2012. Background: Both protein and caffeine coingestion with CHO have been suggested to represent effective dietary strategies to further accelerate postexercise muscle glycogen synthesis in athletes. Purpose: This study aimed to assess the effect of protein or caffeine coingestion on postexercise muscle glycogen synthesis rates when optimal amounts of CHO are ingested. Methods: Fourteen male cyclists were studied on three different test days. Each test day started with a glycogen-depleting exercise session. This was followed by a 6-h recovery period, during which subjects received 1.2 gIkgj1 Ihj1 CHO, the same amount of CHO with 0.3 gIkgj1 Ihj1 of a protein plus leucine mixture (CHO + PRO), or 1.7 mgIkgj1 Ihj1 caffeine (CHO + CAF). All drinks were enriched with [U-13C6]-labeled glucose to assess potential differences in the appearance rate of ingested glucose from the gut. Muscle biopsies were collected immediately after cessation of exercise and after 6 h of postexercise recovery. Results: The plasma insulin response was higher in CHO + PRO compared with CHO and CHO + CAF (P G 0.01). Plasma glucose responses and glucose appearance rates did not differ between experiments. Muscle glycogen synthesis rates averaged 31 T 4, 34 T 4, and 31 T 4 mmolIkgj1 dry weightIhj1 in CHO, CHO + PRO, and CHO + CAF, respectively (P = NS). In accordance, histochemical analyses did not show any differences between net changes in Type I and Type II muscle fiber glycogen content between experiments. Conclusions: Coingestion of protein or caffeine does not further accelerate postexercise muscle glycogen synthesis when ample amounts of CHO (1.2 gIkgj1 Ihj1 ) are ingested

KeywordsInsulin; Leucine; Glycogen Synthase; Amino acids; 13C-Glucose
Year2012
JournalMedicine and Science in Sports and Exercise
Journal citation44 (4), pp. 692 - 700
PublisherLippincott Williams & Wilkins
ISSN0195-9131
Digital Object Identifier (DOI)https://doi.org/10.1249/MSS.0b013e31823a40ef
Scopus EID2-s2.0-84858702949
Page range692 - 700
Research GroupMary MacKillop Institute for Health Research
Publisher's version
File Access Level
Controlled
Place of publicationUnited States
Permalink -

https://acuresearchbank.acu.edu.au/item/89v02/impact-of-caffeine-and-protein-on-postexercise-muscle-glycogen-synthesis

Restricted files

Publisher's version

  • 55
    total views
  • 0
    total downloads
  • 1
    views this month
  • 0
    downloads this month
These values are for the period from 19th October 2020, when this repository was created.

Export as