How Long Is Long Enough? Controlling for Acute Caffeine Intake in Cardiovascular Research
| dc.contributor.author | Grant, Shara S. | en |
| dc.contributor.author | Kim, Kye | en |
| dc.contributor.author | Friedman, Bruce H. | en |
| dc.date.accessioned | 2023-02-10T14:41:04Z | en |
| dc.date.available | 2023-02-10T14:41:04Z | en |
| dc.date.issued | 2023-01-29 | en |
| dc.date.updated | 2023-02-10T14:28:39Z | en |
| dc.description.abstract | Caffeine substantially affects cardiovascular functioning, yet wide variability exists in caffeine control procedures in cardiovascular reactivity research. This study was conducted in order to identify a minimal abstention duration in habitual coffee consumers whereby cardiovascular reactivity is unconfounded by caffeine; Six hours (caffeine’s average half-life) was hypothesized. Thirty-nine subjects (mean age: 20.9; 20 women) completed a repeated measures study involving hand cold pressor (CP) and memory tasks. Caffeinated and decaffeinated coffee were administered. The following cardiovascular indices were acquired during pre-task, task, and post-task epochs prior to coffee intake, 30 min-, and six hours post-intake: Heart rate (HR), high-frequency heart rate variability (HF-HRV), root mean squared successive differences (RMSSD), systolic and diastolic blood pressures (SBP, DBP), mean arterial pressure (MAP), pre-ejection period (PEP), left ventricular ejection time (LVET), systemic vascular resistance (SVR), systemic vascular resistance index (SVRI). Results support the adequacy of a six-hour abstention in controlling for caffeine-elicited cardiovascular changes. The current study offers a suggested guideline for caffeine abstention duration in cardiovascular research in psychophysiology. Consistent practice in caffeine abstention protocols would promote validity and reliability across such studies. | en |
| dc.description.version | Published version | en |
| dc.format.mimetype | application/pdf | en |
| dc.identifier.citation | Grant, S.S.; Kim, K.; Friedman, B.H. How Long Is Long Enough? Controlling for Acute Caffeine Intake in Cardiovascular Research. Brain Sci. 2023, 13, 224. | en |
| dc.identifier.doi | https://doi.org/10.3390/brainsci13020224 | en |
| dc.identifier.uri | http://hdl.handle.net/10919/113769 | en |
| dc.language.iso | en | en |
| dc.publisher | MDPI | en |
| dc.rights | Creative Commons Attribution 4.0 International | en |
| dc.rights.uri | http://creativecommons.org/licenses/by/4.0/ | en |
| dc.subject | caffeine | en |
| dc.subject | coffee | en |
| dc.subject | cardiovascular | en |
| dc.subject | methodology | en |
| dc.subject | autonomic | en |
| dc.title | How Long Is Long Enough? Controlling for Acute Caffeine Intake in Cardiovascular Research | en |
| dc.title.serial | Brain Science | en |
| dc.type | Article - Refereed | en |
| dc.type.dcmitype | Text | en |