Effects of Carbohydrate Ingestion and Carbohydrate Mouth Rinse on Repeat Sprint Performance.
The purpose of this investigation was to examine to the influence of carbohydrate ingestion (CHOI) and carbohydrate mouth rinse (CHOR) on acute repeat maximal sprint performance. Fourteen healthy males (age: 21.7 ± 1.8 years, mass: 82.3 ± 12.3 kg) completed a total of five 15-s maximal repeat sprints on a cycle ergometer against 0.075 kg ・ kg-1body mass each separated by 4 min of active recovery. Subjects completed four experimental trials and were randomly assigned one of four treatments: (1) CHOI, (2) CHOR, (3) placebo mouth rinse (PLAR), (4) placebo ingestion (PLAI). Subjects rinsed or ingested six 50 mL 10% CHO solutions throughout each trial. Performance variables measured included rating of perceived exertion, peak heart rate, peak and mean power output, fatigue index, and total work. Significant treatment main effects were observed for mean power output (p = 0.026), total work (p = 0.020), fatigue index (p = 0.004), and heart rate (p = 0.013). Overall mean power output and total work were significantly greater with CHOI (659.3 ± 103.0 watts, 9849.8 ± 1598.8 joules) compared with CHOR (645.8 ± 99.7 watts, 9447.5 ± 1684.9 joules, p < .05). CHOI (15.3 ± 8.6 watts/s) significantly attenuated fatigue index compared with CHOR (17.7 ± 10.4 watts/s, p < .05). Based on our findings, CHOI was more likely to provide a beneficial performance effect compared with CHOR, PLAI, and PLAR. Athletes required to complete repeat bouts of high intensity exercise may benefit from CHOI.
Ben M
BM
Krings
Timothy J
TJ
Peterson
Brandon D
BD
Shepherd
Matthew J
MJ
McAllister
JohnEric W
JW
Smith
D054874:Athletic Performance / Q000502:physiology*; D001642:Bicycling; D018592:Cross-Over Studies; D004040:Dietary Carbohydrates / Q000008:administration & dosage*; D004311:Double-Blind Method; D004435:Eating; D005080:Exercise Test; D006339:Heart Rate; D006801:Humans; D008297:Male; D009067:Mouthwashes / Q000494:pharmacology*; D018763:Muscle Fatigue / Q000187:drug effects; D055815:Young Adult
D004040:Dietary Carbohydrates; D009067:Mouthwashes
Ergogenic aids; anaerobic exercise; cycling; high intensity interval training