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Open AccessArticle

Heart Rate Variability Behavior during Exercise and Short-Term Recovery Following Energy Drink Consumption in Men and Women

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Physiology of Work and Exercise Response (POWER) Laboratory, Institute of Exercise Physiology and Rehabilitation Science, University of Central Florida, 12494 University Blvd., Orlando, FL 32816, USA
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Division of Kinesiology, School of Kinesiology and Physical Therapy, University of Central Florida, 12494 University Blvd., Orlando, FL 32816, USA
3
Exercise Physiology Intervention and Collaboration (EPIC) Laboratory, Institute of Exercise Physiology and Rehabilitation Science, University of Central Florida, 12494 University Blvd., Orlando, FL 32816, USA
*
Author to whom correspondence should be addressed.
Nutrients 2020, 12(8), 2372; https://doi.org/10.3390/nu12082372
Received: 2 July 2020 / Revised: 2 August 2020 / Accepted: 5 August 2020 / Published: 8 August 2020
(This article belongs to the Special Issue Effect of Energy Drinks on Physical Performance)
This study examined the cardiac autonomic responses, as measured by heart rate variability (HRV), during cycling exercise and short-term rest after energy drink consumption. Seventeen participants (seven males and 10 females; age: 22.8 ± 3.5 years; BMI: 24.3 ± 3.3 kg/m2) completed this double-blind, placebo-controlled, counterbalanced crossover design study. Participants received an energy drink formula containing 140 mg of caffeine and a placebo in a randomized order before completing a 10-min steady-state warm up (WUP) and a graded exercise test to exhaustion (GXT) followed by a 15-min short-term rest (STR) period. Heartbeat intervals were recorded using a heart rate monitor. Data were divided into WUP, GXT, and STR phases, and HRV parameters were averaged within each phase. Additionally, root mean square of the standard deviation of R–R intervals (RMSSD) during GXT was analyzed to determine the HRV threshold. Separate two-way (sex (male vs. female) x drink (energy drink vs. placebo)) repeated measures ANOVA were utilized. Significant increases in high frequency (HF) and RMSSD were shown during WUP after energy drink consumption, while interactions between drink and sex were observed for HRV threshold parameters (initial RMSSD and rate of RMSSD decline). No significant differences were noted during STR. Energy drink consumption may influence cardiac autonomic responses during low-intensity exercise, and sex-based differences in response to graded exercise to exhaustion may exist. View Full-Text
Keywords: energy drink; thermogenic drink formula; caffeine; autonomic nervous system; vagal withdrawal; heart rate variability threshold; sex-differences energy drink; thermogenic drink formula; caffeine; autonomic nervous system; vagal withdrawal; heart rate variability threshold; sex-differences
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MDPI and ACS Style

Clark, N.W.; Herring, C.H.; Goldstein, E.R.; Stout, J.R.; Wells, A.J.; Fukuda, D.H. Heart Rate Variability Behavior during Exercise and Short-Term Recovery Following Energy Drink Consumption in Men and Women. Nutrients 2020, 12, 2372. https://doi.org/10.3390/nu12082372

AMA Style

Clark NW, Herring CH, Goldstein ER, Stout JR, Wells AJ, Fukuda DH. Heart Rate Variability Behavior during Exercise and Short-Term Recovery Following Energy Drink Consumption in Men and Women. Nutrients. 2020; 12(8):2372. https://doi.org/10.3390/nu12082372

Chicago/Turabian Style

Clark, Nicolas W.; Herring, Chad H.; Goldstein, Erica R.; Stout, Jeffrey R.; Wells, Adam J.; Fukuda, David H. 2020. "Heart Rate Variability Behavior during Exercise and Short-Term Recovery Following Energy Drink Consumption in Men and Women" Nutrients 12, no. 8: 2372. https://doi.org/10.3390/nu12082372

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