DrCarney.com Blog

Health - Food - Science - Community
1 minute reading time (198 words)

Effect of caffeine on blood pressure, heart rate, forearm blood flow during dynamic leg exercise.

Caffeine intake is associated with increased blood pressure and decreased forearm blood flow during dynamic exercise.

This study investigated how caffeine affects the cardiovascular system during dynamic exercise. Researchers studied 10 professional, caffeine-naïve cyclists who were assigned into either a caffeine group or a placebo group. After intervention with caffeine or fructose (placebo), the subjects were made to rest for 100 minutes or rest for 45minutes followed by 55minutes of bicycle ergometry. The mean arterial pressure (MAP), systolic and diastolic blood pressures, skin temperature, rectal temperature, heart rate, forearm blood flow (FBF), plasma angiotensin II and forearm vascular conductance (FVC) were assessed in all the subjects during dynamic exercise and at rest.

Researchers observed increased systolic, diastolic, and mean arterial pressures in the caffeine group during the resting and exercise stages. However, reduced FBF and FVC and elevated serum concentrations of angiotensin II were found in the group given caffeine during the exercise phase. Caffeine had no effect on FVC and FBC in the resting phase and on heart rate, rectal temperature, and skin temperate in both phases. The results of this study reveal that caffeine reduces forearm blood flow and increases blood pressures during dynamic exercise.


Research Summary Information

Stay Informed

When you subscribe to the blog, we will send you an e-mail when there are new updates on the site so you wouldn't miss them.

A meta-analysis of risk of pregnancy loss and caff...
Acute effect of caffeine on arterial stiffness and...

Related Posts


Off Canvas Main Menu Display