The effects of different doses of caffeine on maximal strength and strength-endurance in women habituated to caffeine
Filip-Stachnik A, Wilk M, Krzysztofik M, Lulińska E, Tufano JJ, Zajac A, Stastny P, Del Coso J
Journal of the International Society of Sports Nutrition · 34 citations
How it was studied
- Design
- Randomized controlled trial (indexed by PubMed)
- Studied in
- People
- Main outcome
- Health markers and function
Who paid for it
- Funding
- Independent funding
- University or hospital
- Univerzita Karlova v Praze
- University or hospital
- Akademia Wychowania Fizycznego im. Jerzego Kukuczki w Katowicach
- University or hospital
- Charles University
- Grants
- Univerzita Karlova v Praze (UNCE-HUM-032)
Based on 3 listed funder(s) and full-text disclosure statement.
Publication
- Published
- 2021-01-02 · J Int Soc Sports Nutr · vol. 18 · issue 1 · p. 25
- Publisher
- Springer Science+Business Media
- Cited
- 49 citations · more than 96% of similar papers · 5.3× the field average
- Impact
- Top 10% most cited in its field
- References
- 65 works
- Access
- Open access (journal) · CC-BY
- Research areas
- Coffee research and impacts · Pharmacology and Obesity Treatment · Muscle metabolism and nutrition
- Keywords
- Caffeine, Bench press, Medicine, Crossover study, Placebo, Physical therapy, Animal science, Analysis of variance, Internal medicine, Resistance training
- MeSH
- humans, caffeine, administration, oral, cross-over studies, double-blind method, drinking behavior, physical endurance, female, muscle strength, young adult, performance-enhancing substances
8 authors
From PL, CZ, ES
- Aleksandra Filip-StachnikAkademii Wychowania Fizycznego im. Jerzego Kukuczki w Katowicach
- Michał Wilk · correspondingAkademii Wychowania Fizycznego im. Jerzego Kukuczki w Katowicach
- Michał KrzysztofikAkademii Wychowania Fizycznego im. Jerzego Kukuczki w Katowicach
- Ewelina Lulińska–KuklikGdansk University of Physical Education and Sport
- James J. TufanoCharles University; Česká Unie Sportu
- Adam ZającAkademii Wychowania Fizycznego im. Jerzego Kukuczki w Katowicach
Abstract
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.
Abstract via Europe PMC. Copyright remains with the authors or publisher (CC BY).
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