The effects of different doses of caffeine on maximal strength and strength-endurance in women habituated to caffeine

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11510%2F21%3A10427182" target="_blank" >RIV/00216208:11510/21:10427182 - isvavai.cz</a>

Result on the web

<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=1C2mGNR.ES" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=1C2mGNR.ES</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1186/s12970-021-00421-9" target="_blank" >10.1186/s12970-021-00421-9</a>

Result language

angličtina

Original language name

The effects of different doses of caffeine on maximal strength and strength-endurance in women habituated to caffeine

Original language description

Purpose The main goal of this study was to assess the acute effects of 3 and 6 mg of caffeine intake per kg of body mass (b.m.) on maximal strength and strength-endurance in women habituated to caffeine. Methods Twenty-one healthy resistance-trained female students (23.0 +/- 0.9 years, body mass: 59.0 +/- 6.6 kg), with a daily caffeine intake of 5.8 +/- 2.6 mg/kg/b.m. participated in a randomized, crossover, double-blind design. Each participant performed three experimental sessions after ingesting either a placebo (PLAC) or 3 mg/kg/b.m. (CAF-3) and 6 mg/kg/b.m. (CAF-6) of caffeine. In each experimental session, the participants underwent a 1RM test and a strength-endurance test at 50 %1RM in the bench press exercise. Maximal load was measured in the 1RM test and the time under tension, number of preformed repetitions, power output and bar velocity were registered in the strength-endurance test. Results The one-way ANOVA showed a main effect of caffeine on 1RM bench press performance (F = 14.74; p &lt; 0.01). In comparison to the PLAC (40.48 +/- 9.21 kg), CAF-3 (41.68 +/- 8.98 kg; p = 0.01) and CAF-6 (42.98 +/- 8.79 kg; p &lt; 0.01) increased 1RM bench press test results. There was also a significant increase in 1RM for CAF-6 when compared to CAF-3 (p &lt; 0.01). There was a main effect of caffeine on time under tension during the strength-endurance test (F = 13.09; p &lt; 0.01). In comparison to the PLAC (53.52 +/- 11.44 s), CAF-6 (61.76 +/- 15.39 s; p &lt; 0.01) significantly increased the time under tension during the maximal strength-endurance test. Conclusion An acute dose of 3-to-6 mg/kg/b.m. of caffeine improves maximum strength. However, these doses of caffeine had minimal ergogenic effect on strength-endurance performance in women habituated to caffeine.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

30306 - Sport and fitness sciences

Project

—

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2021

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Journal of the International Society of Sports Nutrition

ISSN

1550-2783

e-ISSN

—

Volume of the periodical

18

Issue of the periodical within the volume

1

Country of publishing house

US - UNITED STATES

Number of pages

10

Pages from-to

1-10

UT code for WoS article

000636300900001

EID of the result in the Scopus database

2-s2.0-85103571404