Acute Effects of Chocolate Milk and a Commercial Recovery Beverage on Postexercise Recovery Indices and Endurance Cycling Performance

Appl Physiol Nutr Metab. 2009 Dec;34(6):1017-22. doi: 10.1139/H09-104.

Abstract

To maximize training quality, athletes have sought nutritional supplements that optimize recovery. This study compared chocolate milk (CHOC) with a carbohydrate replacement beverage (CRB) as a recovery aid after intense exercise, regarding performance and muscle damage markers in trained cyclists. Ten regional-level cyclists and triathletes (maximal oxygen uptake 55.2 +/- 7.2 mL.kg(-1).min(-1)) completed a high-intensity intermittent exercise protocol, then 15-18 h later performed a performance trial at 85% of maximal oxygen uptake to exhaustion. Participants consumed 1.0 g carbohydrate.kg-1.h-1 of a randomly assigned isocaloric beverage (CHOC or CRB) after the first high-intensity intermittent exercise session. The same protocol was repeated 1 week later with the other beverage. A 1-way repeated measures analysis of variance revealed no significant difference (p = 0.91) between trials for time to exhaustion at 85% of maximal oxygen uptake (CHOC 13 +/- 10.2 min, CRB 13.5 +/- 8.9 min). The change in creatine kinase (CK) was significantly (p < 0.05) greater in the CRB trial than in the CHOC trial (increase CHOC 27.9 +/- 134.8 U.L(-1), CRB 211.9 +/- 192.5 U.L(-1)), with differences not significant for CK levels before the second exercise session (CHOC 394.8 +/- 166.1 U.L(-1), CRB 489.1 +/- 264.4 U.L(-1)) between the 2 trials. These findings indicate no difference between CHOC and this commercial beverage as potential recovery aids for cyclists between intense workouts.

Publication types

  • Clinical Trial
  • Randomized Controlled Trial

MeSH terms

  • Adult
  • Animals
  • Athletic Performance / physiology*
  • Beverages*
  • Bicycling
  • Cacao*
  • Creatine Kinase / blood
  • Cross-Over Studies
  • Diet Records
  • Diet Surveys
  • Dietary Carbohydrates*
  • Dietary Supplements
  • Exercise Test
  • Humans
  • Milk*
  • Muscle Fatigue*
  • Oxygen Consumption
  • Physical Endurance / physiology*
  • Physical Fitness / physiology
  • Young Adult

Substances

  • Dietary Carbohydrates
  • Creatine Kinase