Influence of Espresso on Heart Rate Variability
Conditions
Brief summary
More than 80% of the population in the USA consume coffee each day. However there not many studies on change of heart rate variability and placebo effects after consumption of coffee. In our study we aim to test the following hypotheses: 1. Habitual caffeinated espresso coffee drinkers show an increase in blood pressure, heart rate variability and parasympathetic activity (high frequency band) of the heart. 2. Non-habitual caffeinated espresso coffee drinkers show an increase of blood pressure. The heart rate variability and the parasympathetic activity of the heart will decrease. 3. Caffeinated or decaffeinated espresso induces comparable changes in habitual or non-habitual coffee drinkers.
Interventions
OTHERhab cof with water
habitual coffee drinker provided with water
OTHERhab cof with dec espresso
habitual coffee drinkers given decaffeinated espresso
OTHERhab cof with caf espresso
habitual coffee drinkers given caffeinated espresso
OTHERnon-hab cof with water
non-habitual coffee drinkers given water
OTHERnon-hab cof with dec espresso
non-habitual coffee drinkers given decaffeinated espresso
OTHERnon-hab cof with caf espresso
non-habitual coffee drinkers given caffeinated espresso
Sponsors
Charite University, Berlin, Germany
Study design
Allocation
RANDOMIZED
Intervention model
CROSSOVER
Primary purpose
BASIC_SCIENCE
Masking
TRIPLE (Subject, Caregiver, Investigator)
Eligibility
Sex/Gender
ALL
Age
18 Years to 50 Years
Healthy volunteers
Yes
Inclusion criteria
* 18- 50 years old, healthy
Exclusion criteria
* Medication, obese(BMI \> 30)
Design outcomes
Primary
| Measure | Time frame |
|---|---|
| Heart rate variability | 70 minutes |
Secondary
| Measure | Time frame |
|---|---|
| blood pressure | 70 min. |
Countries
Germany
Outcome results
None listed