TY - JOUR
T1 - Effect of caffeine ingestion after creatine supplementation on intermittent high-intensity sprint performance
AU - Lee, Chia Lun
AU - Lin, Jung Charng
AU - Cheng, Ching Feng
N1 - Funding Information:
Acknowledgments The authors thank all participants for their effort and dedication to the protocol. This study was supported by a research grant from National Science Council, Taiwan (NSC 97-2410-H-034-028).
PY - 2011/8
Y1 - 2011/8
N2 - The aim of this study was to investigate the effects of acute caffeineingestion on intermittent highintensity sprint performance after 5 days of creatine loading. After completing a control trial (no ergogenic aids, CON), twelve physically active men were administered in a double-blind, randomized crossover protocol to receive CRE + PLA (0.3 g kg -1day-1 of creatine for 5 days then followed by 6 mg kg -1 of placebo)and CRE + CAF (0.3 gkg -1 day-1 of creatine for 5 days and followed by 6 mg kg -1 of caffeine), after which theyperformed a repeated sprint test. Each test consisted of six 10-s intermittent high-intensity sprints on a cycling ergometer, with 60-srest intervals between sprints. Mean power, peak power, rating of perceived exertion (RPE), and heart rates were measured during the test. Blood samples for lactate, glucose, and catecholamine concentrations were drawn at specified intervals. The mean and peak powerobserved in the CRE + CAF were significantly higher than those found in the CON during Sprints 1 and 3; and the CRE + CAF showed significantly higher mean and peak power than that in the CRE + PLA during Sprints 1 and 2.Themean and peak power during Sprint 3 in the CRE + PLA was significantly greater than that in the CON. Heart rates, plasma lactate, and glucose increased significantly with CRE + CAF during most sprints. No significant differences werez observed in the RPE among the three trials. The present study determined that caffeine ingestion after creatine supplements augmented intermittent high-intensity sprint performance.
AB - The aim of this study was to investigate the effects of acute caffeineingestion on intermittent highintensity sprint performance after 5 days of creatine loading. After completing a control trial (no ergogenic aids, CON), twelve physically active men were administered in a double-blind, randomized crossover protocol to receive CRE + PLA (0.3 g kg -1day-1 of creatine for 5 days then followed by 6 mg kg -1 of placebo)and CRE + CAF (0.3 gkg -1 day-1 of creatine for 5 days and followed by 6 mg kg -1 of caffeine), after which theyperformed a repeated sprint test. Each test consisted of six 10-s intermittent high-intensity sprints on a cycling ergometer, with 60-srest intervals between sprints. Mean power, peak power, rating of perceived exertion (RPE), and heart rates were measured during the test. Blood samples for lactate, glucose, and catecholamine concentrations were drawn at specified intervals. The mean and peak powerobserved in the CRE + CAF were significantly higher than those found in the CON during Sprints 1 and 3; and the CRE + CAF showed significantly higher mean and peak power than that in the CRE + PLA during Sprints 1 and 2.Themean and peak power during Sprint 3 in the CRE + PLA was significantly greater than that in the CON. Heart rates, plasma lactate, and glucose increased significantly with CRE + CAF during most sprints. No significant differences werez observed in the RPE among the three trials. The present study determined that caffeine ingestion after creatine supplements augmented intermittent high-intensity sprint performance.
KW - Anaerobic
KW - Catecholamine
KW - Ergogenic aids
KW - Glycolytic metabolism
KW - Repeated-sprint ability.
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U2 - 10.1007/s00421-010-1792-0
DO - 10.1007/s00421-010-1792-0
M3 - Article
C2 - 21207054
AN - SCOPUS:80053915266
SN - 1439-6319
VL - 111
SP - 1669
EP - 1677
JO - European Journal of Applied Physiology
JF - European Journal of Applied Physiology
IS - 8
ER -
