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

Kód výsledku v 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>

Výsledek na webu

<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>

Jazyk výsledku

angličtina

Název v původním jazyce

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

Popis výsledku v původním jazyce

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.

Název v anglickém jazyce

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

Popis výsledku anglicky

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.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

30306 - Sport and fitness sciences

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2021

Kód důvěrnosti údajů

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

Název periodika

Journal of the International Society of Sports Nutrition

ISSN

1550-2783

e-ISSN

—

Svazek periodika

18

Číslo periodika v rámci svazku

1

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

10

Strana od-do

1-10

Kód UT WoS článku

000636300900001

EID výsledku v databázi Scopus

2-s2.0-85103571404