TY - JOUR
T1 - Caffeine ingestion improves power output decrement during 3-min all-out exercise
AU - Cheng, Ching Feng
AU - Hsu, Wei Chieh
AU - Kuo, Yu Hsuan
AU - Shih, Ming Tsung
AU - Lee, Chia Lun
N1 - Funding Information:
The authors wish to thank the participants who contributed their time and effort to undertake this study and to Polypact International Co., Ltd., who sponsored the consumable materials of Cortex metabolic analysis system. This work is particularly supported by “Aim for the Top University Plan” of National Taiwan Normal University and the Ministry of Education, Taiwan.
Publisher Copyright:
© 2016, Springer-Verlag Berlin Heidelberg.
PY - 2016/9/1
Y1 - 2016/9/1
N2 - Purpose: To investigate the effect of caffeine ingestion on the 3-min all-out test (3MT) performance and plasma electrolytes in athletes. Methods: Fifteen collegiate male basketball players were recruited and completed two trials separated by at least 1 week in caffeine (CAF, 6 mg kg−1) and placebo conditions. During the first visit, participants performed an incremental cycling test to determine their 3MT resistance. After a familiarization trial, participants performed a CAF or PL trial according to a randomized crossover design. One hour after ingesting capsules, the participants performed the 3MT to estimate the end-test power (EP) and work done above EP (WEP). Blood samples for sodium (Na+), potassium (K+), pH, and lactate concentrations were drawn pretest, 1 h after ingestion, and posttest. Results: Significant differences in WEP (CAF vs. PL, 13.4 ± 3.0 vs. 12.1 ± 2.7 kJ, P < 0.05) but not in EP (CAF vs. PL, 242 ± 37 vs. 244 ± 42 W, P > 0.05) were determined between the conditions. Compared with the PL condition, the CAF condition yielded significantly higher power outputs (60–150 s), a lower fatigue rate during the 3MT (CAF vs. PL, 0.024 ± 0.007 vs. 0.029 ± 0.006 s−1, P < 0.05), a significantly higher lactate concentration after the 3MT, and significantly lower K+ concentrations at 1 h after caffeine ingestion. There were no significant interaction effects for pH and Na+ concentrations. Conclusions: Caffeine ingestion did not change EP but improved WEP and the rate of decline in power output during short-term, severe exercise.
AB - Purpose: To investigate the effect of caffeine ingestion on the 3-min all-out test (3MT) performance and plasma electrolytes in athletes. Methods: Fifteen collegiate male basketball players were recruited and completed two trials separated by at least 1 week in caffeine (CAF, 6 mg kg−1) and placebo conditions. During the first visit, participants performed an incremental cycling test to determine their 3MT resistance. After a familiarization trial, participants performed a CAF or PL trial according to a randomized crossover design. One hour after ingesting capsules, the participants performed the 3MT to estimate the end-test power (EP) and work done above EP (WEP). Blood samples for sodium (Na+), potassium (K+), pH, and lactate concentrations were drawn pretest, 1 h after ingestion, and posttest. Results: Significant differences in WEP (CAF vs. PL, 13.4 ± 3.0 vs. 12.1 ± 2.7 kJ, P < 0.05) but not in EP (CAF vs. PL, 242 ± 37 vs. 244 ± 42 W, P > 0.05) were determined between the conditions. Compared with the PL condition, the CAF condition yielded significantly higher power outputs (60–150 s), a lower fatigue rate during the 3MT (CAF vs. PL, 0.024 ± 0.007 vs. 0.029 ± 0.006 s−1, P < 0.05), a significantly higher lactate concentration after the 3MT, and significantly lower K+ concentrations at 1 h after caffeine ingestion. There were no significant interaction effects for pH and Na+ concentrations. Conclusions: Caffeine ingestion did not change EP but improved WEP and the rate of decline in power output during short-term, severe exercise.
KW - Anaerobic power
KW - Critical power
KW - Ergogenic aid
KW - Nutritional supplement
KW - Performance
KW - Short-term high-intensity exercise
UR - http://www.scopus.com/inward/record.url?scp=84976517794&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84976517794&partnerID=8YFLogxK
U2 - 10.1007/s00421-016-3423-x
DO - 10.1007/s00421-016-3423-x
M3 - Article
C2 - 27372742
AN - SCOPUS:84976517794
SN - 1439-6319
VL - 116
SP - 1693
EP - 1702
JO - European Journal of Applied Physiology
JF - European Journal of Applied Physiology
IS - 9
ER -
