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Caffeine ingestion alters central hemodynamics following aerobic exercise in middle-aged men

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European Journal of Applied Physiology Aims and scope Submit manuscript

Abstract

Purpose

To examine the acute influence of caffeine on post-exercise central blood pressures, arterial stiffness, and wave reflection properties.

Methods

In a double-blind randomized placebo-controlled crossover study design, ten middle-aged males (55 ± 5 year) completed two exercise trials after ingestion of caffeine (400 mg) or placebo. Measurements were taken before and 30 min post-ingestion via cuff-based pulse wave analysis (PWA) and carotid-femoral pulse wave velocity (PWV). Participants performed a 40-min cycling bout at 70% HRmax with matched workloads between trials. PWA and PWV were reassessed 30 min post-exercise.

Results

Prior to exercise, compared to placebo, caffeine increased brachial systolic blood pressure (bSBP) (+ 12.3 ± 2.4 mmHg; p = 0.004), brachial diastolic blood pressure (bDBP) (+ 7.7 ± 0.9 mmHg; p = 0.011), central systolic blood pressure (cSBP) (+ 11.1 ± 2.1 mmHg; p = 0.005) and central diastolic blood pressure (cDBP) (+ 7.6 ± 1.0 mmHg; p = 0.012). PWV was higher 30 min after pill ingestion (p = 0.021 for time) with a trend for a greater increase in caffeine (p = 0.074 for interaction). bSBP (p = 0.036) and cSBP (p = 0.007) were lower after exercise but remained higher (both p < 0.001) in caffeine compared to placebo. PWV remained higher (p = 0.023) after exercise in caffeine compared to placebo but was not influenced by exercise. At rest, augmentation pressure (AP) and index (AIx) were not influenced by caffeine ingestion. Conversely, AIx was lower (p = 0.009) after exercise in placebo only.

Conclusion

In healthy and active middle-aged men, pre-exercise caffeine ingestion led to higher central and peripheral systolic blood pressures, PWV and AIx at 30 min post-exercise, indicating an increased left ventricular workload which may have implications for cardiovascular event risk.

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Availability of data and materials

The datasets generated during and/or analyzed during the current study are available from the corresponding author on reasonable request.

Abbreviations

AIx:

Augmentation index

AIx@75:

Augmentation index at heart rate of 75 bpm

ANOVA:

Analysis of variance

AP:

Augmentation pressure

bSBP:

Brachial systolic blood pressure

bDBP:

Brachial diastolic blood pressure

cfPWV:

Carotid-femoral pulse wave velocity

cSBP:

Central systolic blood pressure

cDBP:

Central diastolic blood pressure

CEP:

Clinical exercise physiology

CV:

Cardiovascular

CVD:

Cardiovascular disease

HR:

Heart rate

MAP:

Mean arterial pressure

PWA:

Pulse wave analysis

PWV:

Pulse wave velocity

RPE:

Rating of perceived exertion

References

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Acknowledgements

The authors would like to thank Brittany Smith for assistance with data collection. The authors have no relationships to disclose. The results of the study are presented clearly, honestly, and without fabrication, falsification, or inappropriate data manipulation.

Author information

Authors and Affiliations

Authors

Contributions

M.H., A.S., and B.K. conceived research question and designed the experimental protocol. M.H. and A.S. were responsible for data collection. M.H., A.S., and B.F. analyzed the data and M.H., A.S., N.C., B.K., and B.F. contributed to data interpretation. MH and AS were primarily responsible for writing of the manuscript and all authors have read and approved the manuscript.

Corresponding author

Correspondence to Matthew P. Harber.

Ethics declarations

Conflict of interest

The authors declare they have no conflict of interest.

Ethics approval

Each participant provided written informed consent as approved by the Institutional Review Board at Ball State University. This study was performed in accordance with the ethical standards as laid down by the 1964 Declaration of Helsinki.

Consent to participate

All subjects provided written informed consent before participating in the research.

Consent for publication

All subjects provided written informed consent to have their results published as part of group means with no personal identifying information.

Additional information

Communicated by Massimo Pagani.

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Harber, M.P., McCurry, A., Carlini, N. et al. Caffeine ingestion alters central hemodynamics following aerobic exercise in middle-aged men. Eur J Appl Physiol 121, 435–443 (2021). https://doi.org/10.1007/s00421-020-04521-3

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  • DOI: https://doi.org/10.1007/s00421-020-04521-3

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