Running head: THEORY OF CARDIOVASCULAR DRIFT 1
THEORY OF CARDIOVASCULAR DRIFT
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THEORY OF CARDIOVASCULAR DRIFT 2
Theory of Cardiovascular Drift
Introduction
Cardiovascular drift can be experienced during prolonged aerobic training as a result of an
increased heartbeat rate. Cyclists such as Chris Froome gives an excellent example since he has
had to endure long-distance cycling. One must have a clear understanding of Cardiac output, stroke
volume, inotropy, lusitropy, vascular resistance, heart rate, the cardiac output formula, and the
Central nervous system to understand the concept. This paper explains the idea of cardiovascular
drift and how it affects a person's performance during prolonged aerobic activities.
A cardiovascular athlete should be aware of the drift.
Athletes such as Chris Froome, who always had the eye of winning a race, have to be aware
of the concept. It may significantly affect the athlete's performance since the cardiovascular system
is liable for distributing an unceasing supply of oxygen and supplements to the significant muscles.
This system is to control an immense energy transmission level while also eliminating metabolites.
Long-distance road cycling, compared to short term training activities, will require more energy
and oxygen. The human oxygen consumption is usually determined on the basis of the severity
and duration of a particular activity.
Cardiovascular changes and dependent factors in an athlete’s body
Before any race, there is a sequence of changes that occur to a cyclist's body, which are
mainly mechanical adjustments, metabolic changes, autonomic variation, and humoral transitions.
The mechanical changes primarily affect the skeletal muscle pump, a series of muscle contractions
around the lower legs, forcing blood in the veins to move towards the heart. The primary purpose
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of this is to increase venous return. The mechanical changes also affect the respiratory muscle
pump, which aids a person take deeper breaths ("Cardiovascular Drift during Training for Fitness
in Metabolic Syndrome Patients—Erratum," 2017).
Metabolic changes occur in the muscle. When a cyclist starts to cycle, he begins to use
oxygen, in a process known as glycolysis, and the prosses require oxygen. In the beginning, there
is a reduction of the oxygen level in the muscles, which forces microvessel around the muscles to
send a low-frequency oscillation to the arterials, and the vessels dilate, allowing the muscles to
receive increased blood flow.
Humans’ Automatic Nervous system, abbreviated as ANS, is responsible for controlling
numerous physiological processes like breathing. ANS regulates venous return and blood pressure.
The Automatic Nervous system (ANS) is branched into two major parts. The Sympathetic nervous
system (SNS) and the Parasympathetic nervous system (PNS). It is majorly tasked with releasing
hormones such as adrenaline, causing a change in behavior. A person either fights or flees, which
in turn increases the heart rate and the heart's contractility to allow more blood to enter the heart.
At the beginning of training, the parasympathetic nervous system is depressed, allowing
for the sympathetic nervous system's invigoration. It causes an accelerated heart rate, which lasts
for about four minutes, relying on the training intensity rate. Heart rate hikes after the original
growth and then steadily rise higher. The heart rate's steady upward progression is balanced by a
relative reduction in the amount of blood pumped by the left ventricle during each contraction
within each heartbeat (stroke volume). It allows cardiac output (amount of blood pumped out of
the heart in any given minute, which is about six liters at rest and about twenty liters during an
intense exercise) to be constant.
THEORY OF CARDIOVASCULAR DRIFT 4
At the start of a cycling race between one and to about 10 minutes, cardiac output and
stroke volume first rise. Both then rise afterward, and then it will be constant within the remaining
exercise time. In other words, the surge of cardiac output results from an increase in heartbeat rate
and stroke volume. The following rise is an outcome of a proper supply of oxygen to maintain the
physical activities' metabolic requirements. After 10 minutes of cycling, cardiac output also
increases but to a greater height than the first ten minutes. The rise in stroke volume then steadily
reduces as the exercise continues passed 30 minutes.
A cardiovascular drift can now be explained as the steady in heart rate rise over a period
paired with an enlightened decline in stroke but constant Cardiac output. A cardiovascular drift
only affects a cyclist when he cycles for a consistent period. It is also associated with dehydration
as a result of risen body temperature. The body temperature increases at the same pace as the heart
rate. As the temperature of the body surges, the athlete’s body reacts by enhancing the flow of
blood to regulate the condition. The blood flow enhancement happens simultaneously to the
functioning muscles, which require a hefty flow volume, which generates antagonism and a
decrease in blood flow from distinct parts of the body.
To understand the concept of dehydration, Chris Froome cycled for two hours without
taking water or any other fluids, and also cycled for two hours and hydrated himself while still
cycling. The research revealed that you would have an increased heart rate when you participate
in an intense exercise without hydrating; hence, you tier up faster than when you take some water
during the practice (Colakoglu, Ozkaya & Balci, 2018).
From the concept, we can understand the importance of hydration before working out. We
can also acknowledge that the heart rate can rise to ten percent higher depending on the type of
work one is partaking and the weather condition at which you are doing an activity. For example,
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if you are working on hot conditions, the heart rate will increase compared to a cold-weather state.
It is the main reason FIFA had to increase the number of substitutes to five during the summer
periods.
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References
Cardiovascular Drift during Training for Fitness in Metabolic Syndrome Patients—Erratum. (,
2017). Medicine & Science in Sports & Exercise, 49(6), 1281. doi:
10.1249/mss.0000000000001283
Colakoglu, M., Ozkaya, O., & Balci, G. (2018). Moderate Intensity Intermittent Exercise
Modality May Prevent Cardiovascular Drift. Sports, 6(3), 98. doi: 10.3390/sports6030098
Mehrabani, J. (2018). Participation in Educational Physical Training Program: Physical Fitness,
Exercise Physiology Knowledge, and Fitness Satisfaction in Inactive Male College
Student. Journal of Physical Fitness, Medicine & Treatment in Sports, 2(2). doi:
10.19080/jpfmts.2018.02.555581
Pouillot, C., Bougrini, K., VI Fane, R., Rambaud, G., Glasenapp, J., Geyer, C., & Adjedj, J.
(2017). Drift evaluation after FFR measurements. Archives of Cardiovascular Diseases
Supplements, 9(1), 12-13. doi: 10.1016/s1878-6480(17)30064-2
