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Does energy drink intake before exercise affect nonlinear dynamics of heart rate variability recovery? a randomized, crossover, double-blind and placebo-controlled trial

Introduction and Objectives: Energy drinks (ED) are recognized to influence the behavior of the sympathetic and parasympathetic components of the autonomic nervous system. We intended to study the influence of ED on non-linear heart rate variability (HRV) following exercise. Material and Methods: Th...

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Main Authors: Andrey Alves Porto (Author), Luana A. Gonzaga (Author), Cicero Jonas R. Benjamim (Author), Vinicius Ferreira Cardoso (Author), David M. Garner (Author), Celso Ferreira (Author), Carlos Roberto Bueno Júnior (Author), Vitor Engracia Valenti (Author)
Format: Book
Published: Instituto Brasileiro de Pesquisa e Ensino em Fisiologia do Exercício, 2023-07-01T00:00:00Z.
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Summary:Introduction and Objectives: Energy drinks (ED) are recognized to influence the behavior of the sympathetic and parasympathetic components of the autonomic nervous system. We intended to study the influence of ED on non-linear heart rate variability (HRV) following exercise. Material and Methods: This randomized, crossover, double-blind, placebo-controlled clinical trial (Protocol number NCT02917889) was completed in a sample of 28 healthy males aged 24.11 ± 3.05 years (min-max 18-29). The first step involved the assessment of maximal oxygen consumption (VO2 max). In the second protocol, the subjects received a placebo (250ml of water) or ED (250ml of energy drink) 15 minutes before the 30-minute exercise on a treadmill. In the third protocol, participants received the alternative protocol to the previous step. The nonlinear HRV were calculated at different times during the protocols. Results: Fractal analysis via Detrended Fluctuation Analysis (DFA) revealed that in the placebo protocol there was an increase in its values compared to recovery (Rec1) vs. Rest (Cohen's d= 1.42) and continued increasing in the last recording intervals: vs. Rec6 (Cohen's d= 0.70) and vs. Rec7 (Cohen's d= 0.85). In the ED protocol, the increase in DFA was only demonstrated when comparing Rec1 vs. Rest (Cohen's d=1.78). Conclusion: ED intake prior to modest aerobic exercise triggered a slight acceleration of recovery.
Item Description:1981-9927

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