Effects of a carbohydrate -, Protein -, and ribose-containing repletion drink during 8 weeks of endurance training on aerobic capacity, endurance performance, and body composition

Joel T. Cramer, Terry J. Housh, Glen O. Johnson, Jared W. Coburn, Jeffrey R. Stout

Research output: Contribution to journalArticle

2 Scopus citations

Abstract

This study compared a carbohydrate-, protein-, and ribose-containing repletion drink vs. carbohydrates alone during 8 weeks of aerobic training. Thirty-two men (age, mean ± SD = 23 ± 3 years) performed tests for aerobic capacity (VO2peak), time to exhaustion (TTE) at 90% V?O2peak, and percent body fat (%fat), and fatfree mass (FFM). Testing was conducted at pre-training (PRE), mid-training at 3 weeks (MID3), mid-training at 6 weeks (MID6), and post-training (POST). Cycle ergometry training was performed at 70% V?O2peak for 1 hours per day, 5 days per week for 8 weeks. Participants were assigned to a test drink (TEST; 370 kcal, 76 g carbohydrate, 14 g protein, 2.2 g d-ribose; n = 15) or control drink (CON; 370 kcal, 93 g carbohydrate; n = 17) ingested immediately after training. Body weight (BW; 1.8% decrease CON; 1.3% decrease TEST from PRE to POST), %fat (5.5% decrease CON; 3.9% decrease TEST), and FFM (0.1% decrease CON; 0.6% decrease TEST) decreased (p ≤ 0.05), whereas V?O2peak (19.1% increase CON; 15.8% increase TEST) and TTE (239.1% increase CON; 377.3% increase TEST) increased (p le; 0.05) throughout the 8 weeks of training. Percent decreases in %fat from PRE to MID3 and percent increases in FFM from PRE to MID3 and MID6 were greater (p # 0.05) for TEST than CON. Overall, even though the TEST drink did not augment BW, V?O2peak, or TTE beyond carbohydrates alone, it did improve body composition (%fat and FFM) within the first 3-6 weeks of supplementation, which may be helpful for practitioners to understand how carbohydrate-protein recovery drinks can and cannot improve performance in their athletes.

Original languageEnglish (US)
Pages (from-to)2234-2242
Number of pages9
JournalJournal of strength and conditioning research
Volume26
Issue number8
DOIs
StatePublished - Aug 2012

Keywords

  • Athletic performance
  • Carbohydrate-protein drink
  • Glycogen resynthesis
  • Nutritional supplement
  • Recovery

ASJC Scopus subject areas

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

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