Impact of Caffeine Intake Strategies on Heart Rate Variability during Post-Exercise Recovery: A Systematic Review and Meta-Analysis.

Autor:	Almeida BA; Research and Innovation Laboratory in Sports and Nutrition Sciences (LAPICEN), Federal University of Rio de Janeiro (UFRJ), Macaé, RJ, Brazil.; Postgraduate Program in Bioactive Products and Biosciences, Federal University of Rio de Janeiro (UFRJ), Macaé, RJ, Brazil.; Laboratory of Natural Products, Federal University of Rio de Janeiro (UFRJ), Macaé, RJ, Brazil., Morales AP; Research and Innovation Laboratory in Sports and Nutrition Sciences (LAPICEN), Federal University of Rio de Janeiro (UFRJ), Macaé, RJ, Brazil.; Macaé Sports Secretary, City Government of Macaé (PMM), Macaé, RJ, Brazil.; Laboratory of Applied Physiology for Health, Performance, and Physical Education (LAPHPE), Higher Institutes of Education of CENSA (ISECENSA), Campos dos Goytacazes, RJ, Brazil.; Postgraduate Program in Nutrition, Institute of Nutrition, Federal University of Rio de Janeiro (UFRJ), Rio de Janeiro, Brazil., Ribeiro JRC; Minas Tennis Club, State University of Minas Gerais, Minas Gerais, Brazil., Sampaio-Jorge F; Research and Innovation Laboratory in Sports and Nutrition Sciences (LAPICEN), Federal University of Rio de Janeiro (UFRJ), Macaé, RJ, Brazil.; Postgraduate Program in Bioactive Products and Biosciences, Federal University of Rio de Janeiro (UFRJ), Macaé, RJ, Brazil.; Macaé Sports Secretary, City Government of Macaé (PMM), Macaé, RJ, Brazil.; Laboratory of Applied Physiology for Health, Performance, and Physical Education (LAPHPE), Higher Institutes of Education of CENSA (ISECENSA), Campos dos Goytacazes, RJ, Brazil., Ribeiro YG; Research and Innovation Laboratory in Sports and Nutrition Sciences (LAPICEN), Federal University of Rio de Janeiro (UFRJ), Macaé, RJ, Brazil.; Postgraduate Program in Bioactive Products and Biosciences, Federal University of Rio de Janeiro (UFRJ), Macaé, RJ, Brazil.; Laboratory of Natural Products, Federal University of Rio de Janeiro (UFRJ), Macaé, RJ, Brazil., Barth T; Postgraduate Program in Bioactive Products and Biosciences, Federal University of Rio de Janeiro (UFRJ), Macaé, RJ, Brazil.; Laboratory of Natural Products, Federal University of Rio de Janeiro (UFRJ), Macaé, RJ, Brazil., Ribeiro BG; Research and Innovation Laboratory in Sports and Nutrition Sciences (LAPICEN), Federal University of Rio de Janeiro (UFRJ), Macaé, RJ, Brazil.; Postgraduate Program in Bioactive Products and Biosciences, Federal University of Rio de Janeiro (UFRJ), Macaé, RJ, Brazil.; Postgraduate Program in Nutrition, Institute of Nutrition, Federal University of Rio de Janeiro (UFRJ), Rio de Janeiro, Brazil.
Jazyk:	angličtina
Zdroj:	Current cardiology reviews [Curr Cardiol Rev] 2024; Vol. 20 (3), pp. 87-100.
DOI:	10.2174/011573403X289842240307114736
Abstrakt:	Objectives: The objective of this systematic review and meta-analysis is to evaluate the influence of caffeine (CAF) intake strategies, taking into account their form, timing, and dosage, on heart rate variability (HRV) indices in the post-exercise recovery period. Methods: The meta-analysis adhered to the Preferred Reporting Items for Systematic Review and Meta-Analysis (PRISMA) guidelines and is registered in the PROSPERO database (CRD42023425885). A comprehensive literature search was carried out across MEDLINE, Web of Science, LILACS, and SCOPUS, concluding in May 2023. We concentrated on randomized clinical trials comparing CAF supplementation effects to placebo on HRV indices post-exercise in active adults aged 18 and above. The primary endpoint was the assessment of HRV indices, measured both prior to and following exercise. Results: Of the 10 studies included, 7 were used for the meta-analysis, and all contributed to the systematic review. The research explored a variety of CAF strategies, spanning different forms (capsule, drink, gum), times (10, 45, 60 min) and doses (2.1 to 6.0 mg/kg). The outcomes revealed no substantial variations between the placebo and CAF conditions in terms of both the square root of the average of successive squared differences between adjacent RR intervals (RMSSD) (standardized mean difference (SMD) -0.03, 95% CI -0.265 to 0.197, p=0.77) and high frequency (HF) index (SMD -0.061, 95% CI -0.272 to 0.150, p=0.57). Furthermore, metaregression analysis, employing a fixed-effects model and accounting for the administered CAF doses, revealed no significant correlation between caffeine doses and HRV indices (p>0.05). Conclusion: In conclusion, there is moderate-certainty evidence suggesting that different CAF intake strategies, encompassing aspects such as form, time, and dose, do not have a significant impact on HRV indices recovery post-exercise (i.e., vagal modulation). (Copyright© Bentham Science Publishers; For any queries, please email at epub@benthamscience.net.)
Databáze:	MEDLINE
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