Glycogen synthesis after road cycling in the fed state

Int J Sports Med. 2009 Jul;30(7):545-9. doi: 10.1055/s-0029-1202341. Epub 2009 May 19.

Abstract

The purpose of this study was to determine the effects of a recovery beverage immediately after exercise on rates of muscle glycogen resynthesis in response to road cycling when nutritional supplementation was supplied during exercise and a solid meal was served two hours after exercise. Eight trained male cyclists, (25+/-4 years, 69.3+/-5.2 kg, VO2 peak=4.5+/-0.4 L.min(-1)) performed two 62 km outdoor training rides in a double-blind, randomized cross-over experiment. Subjects received a food bar and a commercial sport drink during each ride. A recovery beverage (40 g CHO+20 g PRO) or a placebo (PL) was administered 30 min post-exercise. At 2 h post-exercise, a solid meal was provided for both trials. There was no difference between trials at any time point for glycogen (140+/-9, 56+/-8, and 70+/-8 mmol.kg(-1)wet wt.(-1).hr.(-1) for pre, post, and 4 h post, respectively). The addition of a supplemental recovery beverage ingested soon after exercise did not significantly increase the rate of muscle glycogen resynthesis after 4 h of recovery when nutritional supplementation is provided during exercise and a meal is consumed 2 h after exercise.

Publication types

  • Randomized Controlled Trial
  • Research Support, Non-U.S. Gov't

MeSH terms

  • Adult
  • Beverages*
  • Bicycling / physiology*
  • Cross-Over Studies
  • Dietary Carbohydrates / administration & dosage
  • Dietary Proteins / administration & dosage
  • Dietary Supplements
  • Double-Blind Method
  • Exercise / physiology
  • Glycogen / biosynthesis*
  • Humans
  • Male
  • Young Adult

Substances

  • Dietary Carbohydrates
  • Dietary Proteins
  • Glycogen