The blood pressure in relation to the
heartbeat is playing a vital role in physical activity and the readiness and
the condition of the body and the system of the person especially the
cardiovascular system. We have to remember that all is related to maintaining a
balance of haemostasis. As we all know the cardiac output is the sum of the
stroke volume and heartbeat and from this equation, we acquire the total volume
of blood pump by the heart per minute. 
And as we can see the number of heartbeats play an important role in
producing the total cardiac output. It can easily put as “physical activity
increase heart rate and increase stroke volume, and in turn, increase the
cardiac output” (Fox.1993 Soekarman.1986 in Akmarawita. 2012). From what we can
understand and from test result of blood pressure and heart rate during resting
stage that we observe from two sample subject, AS1 and AS2 (which has an
athletics lifestyle) both are senior taekwondo student and from two other
different subject, NS1 and NS2 (no athletic lifestyle background) both which
are from non-physically active individual, where it is found that the senior
taekwondo student has a lower number of heartbeat compare to the non-physically
active person. The data show that AS1 register 60 heartbeat/min and AS2
register 69 heartbeat/min while for NS1 register 82 beats/min and NS2 86
beat/min. We can conclude from the result of the test subject of the 2 group of
people show that a physically active person has a lower heartbeat due to having
a difference in anatomical structure of the heart muscle and the explanation
for this is that these group of people has a more elastic and thicker muscle
structure and this more effective heart structure which allows the heart to
relax and give stronger contraction during each cardiac cycle, and this is made
possible due to that they have been trained to perform physical activity
routinely. That the reason why athlete of physically active person has a lower
heart rate for pre and post physical activity is due to the stronger and more
optimize amount of blood that are able to be contracted from the ventricle
during it relaxing stage in the cardiac cycle and because of this stronger and
more effective amount of blood pump toward the lungs or the head and to the
rest of the body causes the baroreceptor to receive the amount of stretch
within the carotid sinus and the aorta arch and this sends the signal to the
cardio regulatory centre in medulla oblongata which in turn interpreted the
data it receives and gives the signal of parasympathetic input to the
sinoatrial node (SA node) to lower the amount of heart beat. So in short due to
the larger cardiac output of a physically active person that causes more
stretch on the baroreceptor, and this causes the brain to increase the
parasympathetic input and reduce the sympathetic input of the autonomic nervous
system and causes the SA node to reduce the heartbeat and balance out the
homeostasis within the system. This is the reason why the athlete or physically
active person has a lower resting heartbeat (can even reach as low as 40
beats/min) compare to normal or non-physically active person.

The heart dedicatedly
powered the entire circulatory system that enables the transportation of
nutrient, oxygen, hormones, immune system and waste that really important to
the survival of the body to function and the heart has only one concern and
that is maintaining pressure (The hearth/under pressure/ With
a system that work in coordination with not just a single organ but with all
the other organ like the lung that responsible of the respiratory system to
which another essential part that works in conjunction with the cardiovascular
system that works in a bulk flow and the autonomic nervous system which consist
of sympathetic and parasympathetic respond that play vital role in everyday
respond either in active mode of condition example sport or a adrenaline rush
situation to the relaxing and smooth and calm activity, for example, reading a
book or just having a nice evening meal with your love one to the master gland
that secretes hormone to other organ and while this response is slower compare
to the fast respond from the receptor or the autonomic nervous system are
working together to maintain haemostasis of the body. It is simply an amazing
system and the unsung hero that often goes unnoticed considering all the
difference in a scenario of physical activity in which the body needs in order
to regulate and maintain the blood pressure and blood flow, it is simply
amazing and impressive on how the cardiovascular system able to accomplish all
of that without even the need to think about it.

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