| Full text | |
| Author(s): |
Benjamim, Cicero Jonas R.
[1]
;
Monteiro, Larissa Raylane L.
[2]
;
Pontes, Yasmim M. de Moraes
[2]
;
da Silva, Amanda A. Marcelino
[1]
;
de Souza, Thays K. Marinho
[1]
;
Valenti, Vitor E.
[3]
;
Garner, David M.
[3, 4]
;
Cavalcante, Taisy C. Ferro
[1]
Total Authors: 8
|
| Affiliation: | [1] Univ Pernambuco, Dev Nutr Phytotherapy & Hyg Res Grp, Petrolina, PE - Brazil
[2] Sch Juazeiro Norte, Nucleus Studies Physiol & Collect Sci, Juazeiro Do Norte, CE - Brazil
[3] UNESP, Ctr Study Autonom Nervous Syst CESNA, Marilia, SP - Brazil
[4] Oxford Brookes Univ, Fac Hlth & Life Sci, Dept Biol & Med Sci, Cardiorespiratory Res Grp, Oxford OX3 0BP - England
Total Affiliations: 4
|
| Document type: | Journal article |
| Source: | REVISTA PORTUGUESA DE CARDIOLOGIA; v. 40, n. 6, p. 399-406, JUN 2021. |
| Web of Science Citations: | 0 |
| Abstract | |
Introduction and objectives: Studies assessing the effects of caffeine (CAF) on the cardiovascular system have demonstrated that CAF can delay cardiac recovery following exercise. This study intended to assess the impact of CAF intake before physical exercise on heart rate variability (HRV) and cardiovascular parameters. Methods: This is a prospective, crossover, controlled clinical trial conducted at the University of Pernambuco, Petrolina, PE, Brazil. The experimental protocol was split into three stages with a minimum of 48 hours between them. Exercises intensity was standardized based on the one repetition maximum test (1RM), obtaining the load of each volunteer for the intensity of 75% of 1RM. In the second and third phases, the control protocols were applied and 300 mg caffeine was given 45 minutes before training. HRV indices were determined at the subsequent times: 0 to 5 minutes of rest (before) and during 30 minutes of recovery (Rec) (after exercise), divided into six intervals, each of 5 minutes. Results: The final sample involved 30 volunteers. CAF delayed HRV recovery after resistance exercise. In general, CAF impaired recovery of HRV after resistance exercise. Significant changes were observed in the RMSSD, SDNN, TINN, SD1, low frequency and high frequency indices between the control and CAF group. Conclusion: CAF protocol delayed parasympathetic regulation of heart rhythm following exercise, slowing recovery of HR, blood pressure and HRV indices after exercise. (C) 2021 Sociedade Portuguesa de Cardiologia. Published by Elsevier Espana, S.L.U. (AU) | |
| FAPESP's process: | 16/02994-1 - Investigation of the involvement of body composition in heart rate dynamics during recovery from submaximal physical exercise and muscle isometric contraction in physically active subjects |
| Grantee: | Vitor Engrácia Valenti |
| Support Opportunities: | Regular Research Grants |