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Ingesting a high-dose carbohydrate solution during the cycle section of a simulated Olympic-distance triathlon improves subsequent run performance.
- Source :
-
Applied Physiology, Nutrition & Metabolism . Aug2012, Vol. 37 Issue 4, p664-671. 8p. 2 Charts, 2 Graphs. - Publication Year :
- 2012
-
Abstract
- The well-established ergogenic benefit of ingesting carbohydrates during single-discipline endurance sports has only been tested once within an Olympic-distance (OD) triathlon. The aim of the present study was to compare the effect of ingesting a 2:1 maltodextrin/fructose solution with a placebo on simulated OD triathlon performance. Six male and 4 female amateur triathletes (age, 25 ± 7 years; body mass, 66.8 ± 9.2 kg; peak oxygen uptake, 4.2 ± 0.6 L·min-1) completed a 1500-m swim time-trial and an incremental cycle test to determine peak oxygen uptake before performing 2 simulated OD triathlons. The swim and cycle sections of the main trials were of fixed intensities, while the run section was completed as a time-trial. Two minutes prior to completing every quarter of the cycle participants consumed 202 ± 20 mL of either a solution containing 1.2 g·min-1 of maltodextrin plus 0.6 g·min-1 of fructose at 14.4% concentration (CHO) or a sugar-free, fruit-flavored drink (PLA). The time-trial was 4.0% ± 1.3% faster during the CHO versus PLA trial, with run times of 38:43 ± 1:10 min:s and 40:22 ± 1:18 min:s, respectively ( p = 0.010). Blood glucose concentrations were higher in the CHO versus PLA trial ( p < 0.001), while perceived stomach upset did not differ between trials ( p = 0.555). The current findings show that a 2:1 maltodextrin/fructose solution (1.8 g·min-1 at 14.4%) ingested throughout the cycle section of a simulated OD triathlon enhances subsequent 10-km run performance in triathletes. [ABSTRACT FROM AUTHOR]
- Subjects :
- *ERGOGENIC aids
*ANALYSIS of variance
*ATHLETIC ability
*CYCLING
*ENDURANCE sports
*CARBOHYDRATE content of food
*STATISTICS
*T-test (Statistics)
*TRIATHLON
*DATA analysis
*EFFECT sizes (Statistics)
*ELITE athletes
*REPEATED measures design
*OXYGEN consumption
*ERGOMETRY
*DATA analysis software
*DESCRIPTIVE statistics
Subjects
Details
- Language :
- English
- ISSN :
- 17155312
- Volume :
- 37
- Issue :
- 4
- Database :
- Academic Search Index
- Journal :
- Applied Physiology, Nutrition & Metabolism
- Publication Type :
- Academic Journal
- Accession number :
- 77508155
- Full Text :
- https://doi.org/10.1139/h2012-040