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Chowing
down on watermelon could lower blood pressure, study suggests
Chowing
down on watermelon could lower blood pressure, study suggests
Date:
April 3,
2014
Source:
Florida State University
Summary:
Watermelon could significantly reduce blood pressure
in overweight individuals both at rest and while under stress. "The pressure
on the aorta and on the heart decreased after consuming watermelon
extract," the small study concludes.
....................................
Be sure to
pick up a watermelon -- or two -- at your local grocery store. It could save
your life.
A new study
by Florida State University Associate Professor Arturo Figueroa, published in
the American Journal of Hypertension, found that watermelon could
significantly reduce blood pressure in overweight individuals both at rest and
while under stress.
"The
pressure on the aorta and on the heart decreased after consuming watermelon
extract," Figueroa said.
The study
started with a simple concept. More people die of heart attacks in cold weather
because the stress of the cold temperatures causes blood pressure to increase
and the heart has to work harder to pump blood into the aorta. That often leads
to less blood flow to the heart.
Thus, people
with obesity and high blood pressure face a higher risk for stroke or heart
attack when exposed to the cold either during the winter or in rooms with low
temperatures.
So, what
might help their hearts?
It turned
out that watermelon may be part of the answer.
Figueroa's
12-week study focused on 13 middle-aged, obese men and women who also suffered
from high blood pressure. To simulate cold weather conditions, one hand of the
subject was dipped into 39 degree water (or 4 degrees Celsius) while Figueroa's
team took their blood pressure and other vital measurements.
Meanwhile,
the group was divided into two. For the first six weeks, one group was given
four grams of the amino acid L-citrulline and two grams of L-arginine per day,
both from watermelon extract. The other group was given a placebo for 6 weeks.
Then, they
switched for the second six weeks.
Participants
also had to refrain from taking any medication for blood pressure or making any
significant changes in their lifestyle, particularly related to diet and
exercise, during the study.
The results
showed that consuming watermelon had a positive impact on aortic blood pressure
and other vascular parameters.
Notably,
study participants showed improvements in blood pressure and cardiac stress
while both at rest and while they were exposed to the cold water.
"That
means less overload to the heart, so the heart is going to work easily during a
stressful situation such as cold exposure," Figueroa said.
Figueroa has
conducted multiple studies on the benefits of watermelon. In the past, he
examined how it impacts post-menopausal women's arterial function and the blood
pressure readings of adults with pre-hypertension.
In addition
to being published in the American Journal of Hypertension, the study
was also published in the US National Library of Medicine National Institutes
of Health and was one of the "top new hypertensive articles" in
MDLinx.
Story
Source:
The above
story is based on materials provided by Florida State University. Note: Materials may be
edited for content and length.
Journal
Reference:
- A. Figueroa, A. Wong, R. Kalfon. Effects of Watermelon Supplementation on Aortic Hemodynamic Responses to the Cold Pressor Test in Obese Hypertensive Adults. American Journal of Hypertension, 2014; DOI: 10.1093/ajh/hpt295
Cite This
Page:
Florida State University.
"Chowing down on watermelon could lower blood pressure, study
suggests." ScienceDaily. ScienceDaily, 3 April 2014.
<www.sciencedaily.com/releases/2014/04/140403095457.htm>.
