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Coletta A, Thompson DL, Raynor HA. The influence of commercially-available carbohydrate and carbohydrate-protein supplements on endurance running performance in recreational athletes during a field trial. J Int Soc Sports Nutr. 2013;10(1):17doi: 10.1186/1550-2783-10-17.
Coletta, A., Thompson, D. L., & Raynor, H. A. (2013). The influence of commercially-available carbohydrate and carbohydrate-protein supplements on endurance running performance in recreational athletes during a field trial. Journal of the International Society of Sports Nutrition, 10(1), 17. https://doi.org/10.1186/1550-2783-10-17
Coletta, Adriana, et al. "The influence of commercially-available carbohydrate and carbohydrate-protein supplements on endurance running performance in recreational athletes during a field trial." Journal of the International Society of Sports Nutrition vol. 10,1 (2013): 17. doi: https://doi.org/10.1186/1550-2783-10-17
Coletta A, Thompson DL, Raynor HA. The influence of commercially-available carbohydrate and carbohydrate-protein supplements on endurance running performance in recreational athletes during a field trial. J Int Soc Sports Nutr. 2013 Mar 28;10(1):17. doi: 10.1186/1550-2783-10-17. PMID: 23537142; PMCID: PMC3614480.
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J Int Soc Sports Nutr. 2013 Mar 28;10(1):17. doi: 10.1186/1550-2783-10-17.

The influence of commercially-available carbohydrate and carbohydrate-protein supplements on endurance running performance in recreational athletes during a field trial.

Journal of the International Society of Sports Nutrition

Adriana Coletta, Dixie L Thompson, Hollie A Raynor

Affiliations

  1. Department of Nutrition, The University of Tennessee- Knoxville, 1215 W Cumberland Avenue, 229 Jessie Harris Building, Knoxville, TN, 37996-1920, USA. [email protected].

PMID: 23537142 PMCID: PMC3614480 DOI: 10.1186/1550-2783-10-17

Abstract

BACKGROUND: It is recommended that endurance athletes consume carbohydrate (CHO) supplements, providing 6-8% CHO concentration, during exercise > 60 minutes to improve athletic performance. Recently research has compared carbohydrate-protein (CHO-P) supplementation to the traditionally used CHO supplementation during endurance exercise, following these supplementation recommendations, in controlled settings, but not under simulated applied conditions such as a field trial. Therefore, the purpose of the present investigation was to test CHO and CHO-P supplementation under applied conditions such that commercially-available isocaloric (CHO-P & double-carbohydrate [CHO-CHO]) and isocarbohydrate (CHO-P & CHO) supplements were compared to a placebo (PLA), within an outdoor running field trial > 60 minutes in order to asses their influence on endurance performance.

METHODS: Twelve male recreational runners completed four, 19.2 km runs, where they were instructed to run at a pace similar to race pace including a final sprint to the finish, which in this case was the final two laps of the course (1.92 km). Supplementation was provided before the start and in 4 km increments. Performance was measured by time to complete the 19.2 km run and last 1.92 km sprint.

RESULTS: Analyses found no difference between supplements in time to complete the 19.2 km run (PLA = 88.6 ± 11.6 min, CHO = 89.1 ± 11.3 min, CHO-P = 89.1 ± 11.8 min, CHO-CHO = 89.6 ± 11.9 min) or last 1.92 km sprint to the finish (PLA = 8.3 ± 1.2 min, CHO = 8.2 ± 1.2 min, CHO-P = 8.2 ± 1.2 min, CHO-CHO = 8.4 ± 1.5 min).

CONCLUSIONS: When following recommendation for supplementation within a field trial, commercially available CHO and CHO-P supplements do not appear to enhance performance in male recreational runners.

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