The Effects of High Doses of Caffeine on Maximal Strength and Muscular Endurance in Athletes Habituated to Caffeine
Wilk M, Krzysztofik M, Filip A, Zajac A, Del Coso J
Nutrients · 57 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
Based on full-text disclosure statement.
Publication
- Published
- 2019-08-15 · Nutrients · vol. 11 · issue 8 · p. 1912
- Publisher
- Multidisciplinary Digital Publishing Institute
- Cited
- 88 citations · more than 98% of similar papers · 7.0× the field average
- Impact
- Top 10% most cited in its field
- References
- 56 works
- Access
- Open access (journal) · CC-BY
- Research areas
- Coffee research and impacts · Pharmacology and Obesity Treatment · Forensic Toxicology and Drug Analysis
- Keywords
- Caffeine, Athletes, Medicine, Physical strength, Physical therapy, Physical medicine and rehabilitation, Psychology, Internal medicine
- MeSH
- humans, caffeine, treatment outcome, cross-over studies, double-blind method, feeding behavior, physical endurance, time factors, coffee, adult, poland, male, muscle strength, young adult, athletes
5 authors
From PL, ES
- Michał Wilk · correspondingAkademii Wychowania Fizycznego im. Jerzego Kukuczki w Katowicach
- Michał KrzysztofikAkademii Wychowania Fizycznego im. Jerzego Kukuczki w Katowicach
- Aleksandra Filip-StachnikAkademii Wychowania Fizycznego im. Jerzego Kukuczki w Katowicach
- Adam ZającAkademii Wychowania Fizycznego im. Jerzego Kukuczki w Katowicach
- Juan Del CosoCamilo José Cela University
Abstract
Background
The main goal of this study was to assess the acute effects of the intake of 9 and 11 mg/kg/ body mass (b.m.) of caffeine (CAF) on maximal strength and muscle endurance in athletes habituated to caffeine.
Methods
The study included 16 healthy strength-trained male athletes (age = 24.2 ± 4.2 years, body mass = 79.5 ± 8.5 kg, body mass index (BMI) = 24.5 ± 1.9, bench press 1RM = 118.3 ± 14.5 kg). All participants were habitual caffeine consumers (4.9 ± 1.1 mg/kg/b.m., 411 ± 136 mg of caffeine per day). This study had a randomized, crossover, double-blind design, where each participant performed three experimental sessions after ingesting either a placebo (PLAC) or 9 mg/kg/b.m. (CAF-9) and 11 mg/kg/b.m. (CAF-11) of caffeine. In each experimental session, participants underwent a 1RM strength test and a muscle endurance test in the bench press exercise at 50% 1RM while power output and bar velocity were measured in each test.
Results
A one-way repeated measures ANOVA revealed a significant difference between PLAC, CAF-9, and CAF-11 groups in peak velocity (PV) (p = 0.04). Post-hoc tests showed a significant decrease for PV (p = 0.04) in the CAF-11 compared to the PLAC group. No other changes were found in the 1RM or muscle endurance tests with the ingestion of caffeine.
Conclusion
The results of the present study indicate that high acute doses of CAF (9 and 11 mg/kg/b.m.) did not improve muscle strength nor muscle endurance in athletes habituated to this substance.
Abstract via Europe PMC. Copyright remains with the authors or publisher (CC BY).
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