title: Acute effects of chocolate milk and a commercial recovery beverage on postexercise recovery indices and endurance cycling performance.
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.
authors.affiliation: Department of Health, Human Performance, and Nutrition, Central Washington University, Ellensburg, WA 98926, USA. KKerr@cwu.edu
authors.forename: Kelly
authors.initials: K
authors.lastname: Pritchett
authors.forename: Philip
authors.initials: P
authors.lastname: Bishop
authors.forename: Robert
authors.initials: R
authors.lastname: Pritchett
authors.forename: Matt
authors.initials: M
authors.lastname: Green
authors.forename: Charlie
authors.initials: C
authors.lastname: Katica
mesh_terms: D000328:Adult; D000818:Animals; D054874:Athletic Performance / Q000502:physiology*; D001628:Beverages; D001642:Bicycling; D002099:Cacao; D003402:Creatine Kinase / Q000097:blood; D018592:Cross-Over Studies; D015930:Diet Records; D004034:Diet Surveys; D004040:Dietary Carbohydrates; D019587:Dietary Supplements; D005080:Exercise Test; D006801:Humans; D008892:Milk; D018763:Muscle Fatigue; D010101:Oxygen Consumption; D010807:Physical Endurance / Q000502:physiology*; D010809:Physical Fitness / Q000502:physiology; D055815:Young Adult
chemical_list: D004040:Dietary Carbohydrates; D003402:Creatine Kinase