Modern lifestyles often involve long periods of sitting, which can increase the risk of heart problems, obesity, and other health issues. Diet also plays a key role in heart health. Coffee and hibiscus tea are two common beverages, but their effects during prolonged sitting are not well understood.
This study will examine how drinking coffee versus hibiscus tea affects blood pressure, heart rate, and heart rate variability in men and women during extended periods of sitting.
Participants (30 in total: 15 women and 15 men) will take part in a randomized crossover study, meaning each person will try both beverages at different times. Data will be collected using questionnaires, body measurements, and devices to measure heart rate, blood pressure, and heart rate variability.
The goal is to better understand how these drinks influence heart health during sedentary behavior.
Age between 18 and 35 years.
Normal to elevated blood pressure (systolic <130 mmHg and diastolic <80 mmHg) and normal resting heart rate (60-100 bpm), ensuring selection of healthy adults and minimizing confounding factors.
Generally healthy, without chronic or acute medical conditions, to reduce external influences on study outcomes.
Physically inactive, not meeting current physical activity guidelines, as the study targets sedentary individuals.
Known allergy or hypersensitivity to hibiscus or coffee, as participants will consume these beverages during the study.
Current use of medications that could influence blood pressure, heart rate, or heart rate variability, including antihypertensive, chronotropic, or vasoactive drugs.
Any medical condition or health issue that may interfere with safe participation or affect study measurements.
King Saud University
Lead sponsor
Princess Nourah Bint Abdulrahman University
Collaborator