Cited by 48Coffee research and impactsSports Performance and TrainingMuscle metabolism and nutrition

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

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Filip-Stachnik, Aleksandra, Wilk, Michal, Krzysztofik, Michal, Lulińska, Ewelina, Tufano, James J., Zajac, Adam, Stastny, Petr, Del Coso, Juan·2021·Journal of the International Society of Sports Nutrition

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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.

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Authors
Filip-Stachnik, A., Wilk, M., Krzysztofik, M., Lulińska, E., Tufano, J. J., Zajac, A., Stastny, P., & Del Coso, J.
Affiliations
  • Akademii Wychowania Fizycznego im. Jerzego Kukuczki w Katowicach (PL)
  • Institute of Sport SciencesThe Jerzy Kukuczka Academy of Physical Education in Katowice ul. Mikolowska 72a 40-065 Katowice Poland
  • Faculty of Physical EducationGdansk University of Physical Education and Sport 80-336 Gdansk Poland
  • Charles University (CZ)
  • Faculty of Physical Education and SportCharles University Prague Czech Republic
  • Centre for Sport StudiesRey Juan Carlos University Fuenlabrada Spain
Venue
Journal of the International Society of Sports Nutrition
Published
2021-01-02
Volume
18
Issue
1
Pages
25-25
ISSN
1550-2783 (ISSN-L)
OpenAlex
W3112806457
Cited by
48
References
65
Citations by year
2026: 3 · 2025: 11 · 2024: 8 · 2023: 6 · 2022: 11 · 2021: 9
FWCI
4.96
Type
journal article
Language
en
Open access
Locations
  • Journal of the International Society of Sports Nutrition (publishedVersion, cc-by)
  • Research Square (acceptedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
Funders
Charles University (UNCE/HUM/032)
Topics
  • Health Sciences › Medicine › Pharmacology › Coffee research and impacts
  • Health Sciences › Medicine › Orthopedics and Sports Medicine › Sports Performance and Training
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cell Biology › Muscle metabolism and nutrition
Keywords
caffeine, caffeine dose, maximal strength, strength endurance, women, resistance training, bench press, ergogenic aids, time under tension, output power, bar velocity, one-repetition maximum, acute caffeine ingestion, time to exhaustion
MeSH terms
Administration, Oral, Caffeine, Double-Blind Method, Drinking Behavior, Female, Humans, Physical Endurance, Cross-Over Studies, Muscle Strength, Young Adult, Performance-Enhancing Substances

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