Document Type
Paper
Abstract
The primary objective is to explore the physiological effects of caffeine on intra-bout exercise-induced blood pressure (BP) and heart rate (HR) deceleration resulting from repeated anaerobic exercise cycling in active university students. Use of caffeinated stimulants has increased in recent years, particularly in the exercise setting. The cardiovascular system (CS) is an essential piece of exercise physiology and is controlled by the autonomic nervous system (ANS). Caffeine has a known effect on the CS during acute exercise. What is not well solidified is the connection between caffeine and exercise-induced markers, such as heart rate recovery (HRR) and BP. Participants underwent a comprehensive informed consent process, baseline physiological measures, including BP and BPM. A double-blind design to assess the effects of caffeine on HRR and BP were measured during two separate appointments. Participants received either 3 mg/kg of caffeine or placebo drink. Following a 15-minute holding period, upon ingesting the drink, participants performed two 30-second maximal-effort cycling bouts on an assault bike, separated by 30 seconds of active recovery. Post-exercise HR measurements were obtained immediately after each bout. Following the exercise session, participants’ BP and HR were recorded in 5-minute intervals for a duration of 15 minutes to assess post-exercise recovery dynamics. Independent t-tests were conducted to determine differences between participants. There were no significant differences (p > 0.05) between the utilization of caffeine administration on, HR and HR deceleration in the present study. The results demonstrated no statistically significant difference between caffeine and non-caffeinated subjects relative to HRR in an acute anaerobic setting. This aligns with previous findings and warrants further research to aerobic settings. Studying caffeine's impact on HRR in aerobic exercise could provide insight into its broader effects on the ANS and CS.
Department(s)
Applied Health Sciences
Date Accepted/Awarded
Spring 5-20-2024
Recommended Citation
Spinler, Maya J.; Payne, Morgan M.; and Carroll, Christopher Dr., "Caffeine’s Impact on Heart Rate Variability During Short-Term Exercise in University Students" (2024). Human Kinetics & Applied Health Sciences Student Works. 14.
https://spark.bethel.edu/human-kinetics-students/14
Terms of Use and License Information
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