Glycogen resynthesis in skeletal muscle following resistive exercise

Med Sci Sports Exerc. 1993 Mar;25(3):349-54.

Abstract

The purpose of this investigation was to determine the influence of post-exercise carbohydrate (CHO) intake on the rate of muscle glycogen resynthesis after high intensity weight resistance exercise in subjects not currently weight training. In a cross-over design, eight male subjects performed sets (mean = 8.8) of six single leg knee extensions at 70% of one repetition max until 50% of full knee extension was no longer possible. Total force application was equated between trials using a strain gauge interfaced to a computer. The subjects exercised in the fasted state. Post-exercise feedings were administered at 0 and 1 h consisting of either a 23% CHO solution (1.5 g.kg-1) or an equal volume of water (H2O). Total force production, preexercise muscle glycogen content, and degree of depletion (-40.6 and -44.3 mmol.kg-1 wet weight) were not significantly different between H2O and CHO trials. As anticipated during the initial 2-h recovery, the CHO trial had a significantly greater rate of muscle glycogen resynthesis as compared with the H2O trial. The muscle glycogen content was restored to 91% and 75% of preexercise levels when water and CHO were provided after 6 h, respectively.

MeSH terms

  • Adult
  • Analysis of Variance
  • Blood Glucose / analysis
  • Dietary Carbohydrates / administration & dosage
  • Dietary Carbohydrates / metabolism*
  • Exercise / physiology*
  • Gluconeogenesis*
  • Glycogen / analysis
  • Glycogen / biosynthesis*
  • Glycolysis
  • Humans
  • Insulin / analysis
  • Insulin / blood
  • Lactates / analysis
  • Lactates / blood
  • Lactates / metabolism
  • Leg / physiology
  • Male
  • Muscles / metabolism*
  • Physical Exertion / physiology
  • Random Allocation
  • Time Factors
  • Water

Substances

  • Blood Glucose
  • Dietary Carbohydrates
  • Insulin
  • Lactates
  • Water
  • Glycogen