• Something wrong with this record ?

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

A. Filip-Stachnik, M. Wilk, M. Krzysztofik, E. Lulińska, JJ. Tufano, A. Zajac, P. Stastny, J. Del Coso

. 2021 ; 18 (1) : 25. [pub] 20210330

Language English Country United States

Document type Journal Article, Randomized Controlled Trial

Persistent link   https://www.medvik.cz/link/bmc21025931

Grant support
UNCE/HUM/032 Charles University

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 < 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 < 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 < 0.01). There was a main effect of caffeine on time under tension during the strength-endurance test (F = 13.09; p < 0.01). In comparison to the PLAC (53.52 ± 11.44 s), CAF-6 (61.76 ± 15.39 s; p < 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.

References provided by Crossref.org

000      
00000naa a2200000 a 4500
001      
bmc21025931
003      
CZ-PrNML
005      
20211026133351.0
007      
ta
008      
211013s2021 xxu f 000 0|eng||
009      
AR
024    7_
$a 10.1186/s12970-021-00421-9 $2 doi
035    __
$a (PubMed)33781269
040    __
$a ABA008 $b cze $d ABA008 $e AACR2
041    0_
$a eng
044    __
$a xxu
100    1_
$a Filip-Stachnik, Aleksandra $u Institute of Sport Sciences, The Jerzy Kukuczka Academy of Physical Education in Katowice, ul. Mikolowska 72a, 40-065, Katowice, Poland
245    14
$a The effects of different doses of caffeine on maximal strength and strength-endurance in women habituated to caffeine / $c A. Filip-Stachnik, M. Wilk, M. Krzysztofik, E. Lulińska, JJ. Tufano, A. Zajac, P. Stastny, J. Del Coso
520    9_
$a 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 < 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 < 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 < 0.01). There was a main effect of caffeine on time under tension during the strength-endurance test (F = 13.09; p < 0.01). In comparison to the PLAC (53.52 ± 11.44 s), CAF-6 (61.76 ± 15.39 s; p < 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.
650    _2
$a aplikace orální $7 D000284
650    _2
$a kofein $x aplikace a dávkování $7 D002110
650    _2
$a klinické křížové studie $7 D018592
650    _2
$a dvojitá slepá metoda $7 D004311
650    _2
$a chování při pití $7 D004327
650    _2
$a ženské pohlaví $7 D005260
650    _2
$a lidé $7 D006801
650    _2
$a svalová síla $x účinky léků $7 D053580
650    _2
$a látky zvyšující výkon $x aplikace a dávkování $7 D058573
650    _2
$a fyzická vytrvalost $x účinky léků $7 D010807
650    _2
$a mladý dospělý $7 D055815
655    _2
$a časopisecké články $7 D016428
655    _2
$a randomizované kontrolované studie $7 D016449
700    1_
$a Wilk, Michal $u Institute of Sport Sciences, The Jerzy Kukuczka Academy of Physical Education in Katowice, ul. Mikolowska 72a, 40-065, Katowice, Poland. m.wilk@awf.katowice.pl
700    1_
$a Krzysztofik, Michal $u Institute of Sport Sciences, The Jerzy Kukuczka Academy of Physical Education in Katowice, ul. Mikolowska 72a, 40-065, Katowice, Poland
700    1_
$a Lulińska, Ewelina $u Faculty of Physical Education, Gdansk University of Physical Education and Sport, 80-336, Gdansk, Poland
700    1_
$a Tufano, James J $u Faculty of Physical Education and Sport, Charles University, Prague, Czech Republic
700    1_
$a Zajac, Adam $u Institute of Sport Sciences, The Jerzy Kukuczka Academy of Physical Education in Katowice, ul. Mikolowska 72a, 40-065, Katowice, Poland
700    1_
$a Stastny, Petr $u Faculty of Physical Education and Sport, Charles University, Prague, Czech Republic
700    1_
$a Del Coso, Juan $u Centre for Sport Studies, Rey Juan Carlos University, Fuenlabrada, Spain
773    0_
$w MED00163148 $t Journal of the International Society of Sports Nutrition $x 1550-2783 $g Roč. 18, č. 1 (2021), s. 25
856    41
$u https://pubmed.ncbi.nlm.nih.gov/33781269 $y Pubmed
910    __
$a ABA008 $b sig $c sign $y p $z 0
990    __
$a 20211013 $b ABA008
991    __
$a 20211026133357 $b ABA008
999    __
$a ok $b bmc $g 1714824 $s 1146438
BAS    __
$a 3
BAS    __
$a PreBMC
BMC    __
$a 2021 $b 18 $c 1 $d 25 $e 20210330 $i 1550-2783 $m Journal of the International Society of Sports Nutrition $n J Int Soc Sports Nutr $x MED00163148
GRA    __
$a UNCE/HUM/032 $p Charles University
LZP    __
$a Pubmed-20211013

Find record

Citation metrics

Archiving options