Caffeine effect on extending time to exhaustion

D 2014

Caffeine effect on extending time to exhaustion

NAMEŠANSKÝ, Ján, Iva HRNČIŘÍKOVÁ and Ondřej SMOLKA

Basic information

Original name

Caffeine effect on extending time to exhaustion

Authors

NAMEŠANSKÝ, Ján (703 Slovakia, guarantor, belonging to the institution), Iva HRNČIŘÍKOVÁ (203 Czech Republic, belonging to the institution) and Ondřej SMOLKA (203 Czech Republic, belonging to the institution)

Edition

Alicante, Special Issue; Supplementary Issue: 8th INSHS International Christmas Sport Scientific Conference, 5-7 December 2013, p. 504-511, 8 pp. 2014

Publisher

University of Alicante

Other information

Language

English

Type of outcome

Stať ve sborníku

Field of Study

Sport and leisure time activities

Country of publisher

Spain

Confidentiality degree

není předmětem státního či obchodního tajemství

Publication form

electronic version available online

RIV identification code

RIV/00216224:14510/14:00076908

Organization unit

Faculty of Sports Studies

ISSN

DOI

http://dx.doi.org/10.14198/jhse.2014.9.Proc1.39

Keywords in English

endurance performance; cycling; nutrition supplements

Abstract

V originále

The purpose of this study was to determine the effect of different doses of caffeine on extending time to exhaustion in long-term endurance exercise. Using a placebo-controlled, double-blind crossover study design, 10 hobby male cyclists (30.3 ± 5.8 y; BMI = 23.5 ± 1.6, VO2max = 56.9 ± 6.6 ml x kg x min) completed three experimental tests. Each test consisted of 1-h steady-state cycling on static ergometer at 70% VO2max load immediately followed by graded exercise test to exhaustion (2.3 W x s). Either placebo or 0 or 7 mg x kg BM of synthetic caffeine with 0.5 l water and maximum of 0.5 mg x kg BM of carbohydrate gel were administered 70 minutes prior to the test. Total exercise time was significantly (p < 0.05) extended by the 7 mg x kg BM of caffeine compared with placebo. Significant (p < 0.05) extension of total exercise time was observed also by the 7 mg x kg compared with 2 mg x kg. No statistically (p = 0.97) significant differences were observed between 2 mg x kg compared with placebo. Positive effect of caffeine on long-term endurance in hobby cyclist was observed only after ingestion of high dosage (7 mg x kg BM). Low dosage (2 mg x kg) didn’t show any ergogenic effect compared with placebo. This result might not be generalized, but rather shows ambiguous effects of this substance.

Links

MUNI/A/0935/2012, interní kód MU

Name: Podávání kofeinu a jeho účinky na vytrvalostní výkon II (Acronym: KF II)

Investor: Masaryk University, Category A

Citovat

NAMEŠANSKÝ, Ján, Iva HRNČIŘÍKOVÁ and Ondřej SMOLKA. Caffeine effect on extending time to exhaustion. Online. In Special Issue; Supplementary Issue: 8th INSHS International Christmas Sport Scientific Conference, 5-7 December 2013. Alicante: University of Alicante, 2014, p. 504-511. ISSN 1988-5202. Available from: https://dx.doi.org/10.14198/jhse.2014.9.Proc1.39.

@inproceedings{1203331,
   author = {Namešanský, Ján and Hrnčiříková, Iva and Smolka, Ondřej},
   address = {Alicante},
   booktitle = {Special Issue; Supplementary Issue: 8th INSHS International Christmas Sport Scientific Conference, 5-7 December 2013},
   doi = {http://dx.doi.org/10.14198/jhse.2014.9.Proc1.39},
   keywords = {endurance performance; cycling; nutrition supplements},
   howpublished = {elektronická verze "online"},
   language = {eng},
   location = {Alicante},
   pages = {504-511},
   publisher = {University of Alicante},
   title = {Caffeine effect on extending time to exhaustion},
   year = {2014}
}

TY  - JOUR
ID  - 1203331
AU  - Namešanský, Ján - Hrnčiříková, Iva - Smolka, Ondřej
PY  - 2014
TI  - Caffeine effect on extending time to exhaustion
PB  - University of Alicante
CY  - Alicante
KW  - endurance performance
KW  - cycling
KW  - nutrition supplements
N2  - The purpose of this study was to determine the effect of different doses of caffeine on extending time to exhaustion in long-term endurance exercise. Using a placebo-controlled, double-blind crossover study design, 10 hobby male cyclists (30.3 ± 5.8 y; BMI = 23.5 ± 1.6, VO2max = 56.9 ± 6.6 ml x kg x min) completed three experimental tests. Each test consisted of 1-h steady-state cycling on static ergometer at 70% VO2max load immediately followed by graded exercise test to exhaustion (2.3 W x s). Either placebo or 0 or 7 mg x kg BM of synthetic caffeine with 0.5 l water and maximum of 0.5 mg x kg BM of carbohydrate gel were administered 70 minutes prior to the test. Total exercise time was significantly (p < 0.05) extended by the 7 mg x kg BM of caffeine compared with placebo. Significant (p < 0.05) extension of total exercise time was observed also by the 7 mg x kg compared with 2 mg x kg. No statistically (p = 0.97) significant differences were observed between 2 mg x kg compared with placebo. Positive effect of caffeine on long-term endurance in hobby cyclist was observed only after ingestion of high dosage (7 mg x kg BM). Low dosage (2 mg x kg) didn’t show any ergogenic effect compared with placebo. This result might not be generalized, but rather shows ambiguous effects of this substance.
ER  -

NAMEŠANSKÝ, Ján, Iva HRNČIŘÍKOVÁ and Ondřej SMOLKA. Caffeine effect on extending time to exhaustion. Online. In \textit{Special Issue; Supplementary Issue: 8th INSHS International Christmas Sport Scientific Conference, 5-7 December 2013}. Alicante: University of Alicante, 2014, p.~504-511. ISSN~1988-5202. Available from: https://dx.doi.org/10.14198/jhse.2014.9.Proc1.39.

Detailed Information on Publication Record