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dc.contributor.authorOrtíz Sánchez, Davides-ES
dc.contributor.authorBravo Sánchez, Alfredoes-ES
dc.contributor.authorRamírez de la Cruz, Maríaes-ES
dc.contributor.authorAbian Vicen, Pabloes-ES
dc.contributor.authorAbian Vicen, Javieres-ES
dc.date.accessioned2024-06-21T09:35:40Z
dc.date.available2024-06-21T09:35:40Z
dc.date.issued2024-03-07es_ES
dc.identifier.issn2072-6643es_ES
dc.identifier.urihttps://doi.org/10.3390/nu16101405es_ES
dc.identifier.urihttp://hdl.handle.net/11531/89814
dc.descriptionArtículos en revistases_ES
dc.description.abstract.es-ES
dc.description.abstractThis study aimed to analyse the placebo effect associated with a high dose of caffeine (9 mg/kg) on heart rate and its variability and on strength tests. Methods: 18 participants experienced in strength training (19.7 ± 2.3 years; 72.2 ± 15.0 kg; 169.6 ± 9.0 cm) performed two days of trials (caffeine-informed/placebo-ingested (placebo) and non-ingested (control)). Firstly, heart rate and its variability were measured while participants lay down for 15 min. After that, bench press and squat tests were performed at 3 different loads (50%, 75% and 90% of 1RM). Perception of performance, effort and side effects were also evaluated. Results: no differences were found in the vast majority of strength variables analysed. Resting heart rate decreased in the placebo trial (60.39 ± 10.18 bpm control vs. 57.56 ± 9.50 bpm placebo, p = 0.040), and mean RR increased (1020.1 ± 172.9 ms control vs. 1071.5 ± 185.7 ms placebo, p = 0.032). Heart rate variability and perception of performance and effort were similar between conditions (p > 0.05 in all cases). Side effects such as activeness and nervousness were reported while consuming the placebo. Conclusions: the placebo effect did not modify performance in the majority of the strength test variables, HRV and perception of performance and effort. However, resting heart rate was reduced, mean RR increased, and some side effects appeared in the placebo trial.en-GB
dc.format.mimetypeapplication/pdfes_ES
dc.language.isoes-ESes_ES
dc.rightsCreative Commons Reconocimiento-NoComercial-SinObraDerivada Españaes_ES
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/3.0/es/es_ES
dc.sourceRevista: Nutrients, Periodo: 1, Volumen: 16, Número: 10, Página inicial: 1405, Página final: .es_ES
dc.titlePlacebo Effect of Caffeine on Physiological Parameters and Physical Performancees_ES
dc.typeinfo:eu-repo/semantics/articlees_ES
dc.description.versioninfo:eu-repo/semantics/publishedVersiones_ES
dc.rights.holderes_ES
dc.rights.accessRightsinfo:eu-repo/semantics/openAccesses_ES
dc.keywords.es-ES
dc.keywordsergogenic aids; strength; heart rate variability; expectations; side effectsen-GB


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