Effects of Caffeine on Countermovement-Jump Performance Variables in Elite Male Volleyball Players
Zbinden-Foncea H, Rada I, Gomez J, Kokaly M, Stellingwerff T, Deldicque L, Peñailillo L
International journal of sports physiology and performance · 24 citations
Review labels
Neutral facts our review recorded about how this study was done. They describe method, never whether we like the result.
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
- Funding not disclosed
Publication
- Published
- 2017-05-10 · Int J Sports Physiol Perform · vol. 13 · issue 2 · pp. 145–150
- Publisher
- Human Kinetics
- Cited
- 44 citations · more than 77% of similar papers · 1.2× the field average
- References
- 30 works
- Access
- Paywalled
- Research areas
- Coffee research and impacts · Muscle metabolism and nutrition · Pharmacology and Obesity Treatment
- Keywords
- Countermovement, Elite, Jump, Caffeine, Mathematics, Psychology, Statistics, Physics
- MeSH
- humans, caffeine, cross-over studies, double-blind method, blood pressure, heart rate, adolescent, male, volleyball, athletic performance, young adult, plyometric exercise
7 authors
- Hermann Zbinden‐Foncea
- Isabel Rada
- Jesús Sánchez Gómez
- Marco Kokaly
- Trent Stellingwerff
- Louise Deldicque
Abstract
Purpose
To examine the effects of a moderate dose of caffeine in elite male volleyball players on countermovement-jump (CMJ) performance, as well as temporal concentric- and eccentric-phase effects.
Methods
Ten elite male volleyball players took part in 2 experimental days via a randomized crossover trial 1 wk apart in which they ingested either 5 mg/kg of caffeine or a placebo in double-blind fashion. Heart rate and blood pressure were measured at rest and 60 min postingestion. Afterward, subjects also performed 3 CMJ trials 60 min postingestion, of which the average was used for further analysis. They filled out a questionnaire on possible side effects 24 h posttrial.
Results
Caffeine intake, compared with placebo, increased CMJ peak concentric force (6.5% ± 6.4%; P = .01), peak power (16.2% ± 8.3%; P < .01), flight time (5.3% ± 3.4%; P < .01), velocity at peak power (10.6% ± 8.0%; P < .01), peak displacement (10.8% ± 6.5%; P < .01), peak velocity (12.6% ± 7.4%; P < .01), peak acceleration (13.5% ± 8.5%; P < .01), and the force developed at peak power (6.0% ± 4.0%; P < .01) and reduced the time between peak power and peak force (16.7% ± 21.6%, P = .04). Caffeine increased diastolic blood pressure by 13.0% ± 8.9% (P < .05), whereas no adverse side effects were found.
Conclusions
The ingestion of 5 mg/kg of anhydrous caffeine improves overall CMJ performance without inducing side effects.
Abstract via Europe PMC. Copyright remains with the authors or publisher.
Community trust
Loading…
How much do you trust this study's findings?
Comments
Sign in to rate, comment on or flag this study.Sign inSomething wrong here?
Flag this study if its information, labels or funding look wrong. An editor reviews every flag.
Sign in to rate, comment on or flag this study.Sign inEducational information about published research. Not medical advice, and not a recommendation to start or stop anything.