Heart Rate Variability ( Hrv )

Introduction: In this experiment, cardiovascular fitness is being determined by measuring how long it takes for the test subjects' to return to their resting heart rate. Cardiovascular fitness is the ability to "transport and use oxygen while exercising" (Dale 2015). Cardiovascular fitness utilizes the "heart, lungs, muscles, and blood working together" while exercising (Dale 2015). It is also how well your body can last during moderate to high intensity cardio for long periods of time (Waehner 2016). The hypothesis is that people who exercise for three or more days will return to their resting heart rate much faster than people who only exercise for less than three days.

A heart rate monitor could have been used instead of the manual method, which would produce a more accurate result of the heart rate measurement. (http://www.topendsports.com/testing/heart-rate-measure.htm).

The authors then share their analysis on the changes of heart rate and GSR at the many different points throughout their study.

The resting heart rate fluctuates over time because it is under control of the autonomic nervous system and the fluctuations are a result of the sympathetic and parasympathetic systems trying to balance each other out.

P6- follows guidelines to interpret collected data for heart rate, breathing rate and temperature before and after a standard period of exercise

The heart rates of participants was tested before the step test, one minute, two minutes, and three minutes after the step test was performed in this experiment. Since heart rate increases while someone is performing physical activity, it was expected that heart rates of the students would be higher than before the step

McCarty and Shaffer (2015) state "we now know that the normal resting rhythm of the heart is highly variable rather than being monotonously regular..." (p. 47) showing the need for a new type of control technique. As a stand-alone treatment, HRV is shown to influence the regulatory system of the heart allowing for controlled, rhythmic beating in the patient using the HRV biofeedback device.

Stress Test: Provides EKG data changes during exercise and this warrants the need for further intervention (McConaghy & Oza, 2013).

In addition, heart rates vary according to exercise, physical needs, age, gender, air temperature, etc. In this experiment the dependent variable

The heart rate variability (HRV) is a non-invasive index of the neural control of the heart, and may reflect the functional state of the central nervous system (18, 19). Heart rate is influenced and regulated by the sympathetic and parasympathetic components of the autonomic nervous system (20). HRV refers to constant changes in the time interval between consecutive

We’ve known in medical circles for nearly 20 years that HRR is a useful index of cardiovascular fitness. The whole area of HRR and its clinical implications is a subject of current investigation, but it is well established that HRR is a strong predictor of both cardiovascular-related and all-cause mortality in healthy adults.

Method and results - The study was compiled of seven female students from the University of Huddersfield. For the exercise a step was used, a polar heart rate monitor was used for each participant with an independent assessor timing the participants, and recording the readings. Results of the study showed there was an increase in heart rate when performing mild exercise.

Cardiac vagal tone is proposed to be an index for” ...psychiatric impairment, including risk for depression” (Rottenberg 2005). In like manner, respiratory sinus arrhythmia (RSA), is proposed to be an index for cardiac vagal tone. In research, this “biological construct” is measured by means of an EKG (ECG). RSA varies during the breathing cycle (inhalation and exhalation) so then one will note heart rate variability. Interest in this topic drove me to look at, on a basic level, what exactly varies. Research on the topic explained that in the EKG the R-R intervals will be shorter during inhalation than in exhalation. And so studying RSA researchers can quantify the extent of the vagus nerve’s part in cardiac control.

Now that the experiment has been tested, the results are in there comes the analysis part of the process. After I had determined my calculation I saw where my beats per minute were over a hundred; this consider me to be Tachycardia. Tachycardia refers to an abnormally fast resting heart rate. When examining what Tachycardia was and how it can be affected made me see that different scenarios will affect the beats per minute. Anxiety, caffeine, stress can all cause someone to have such a rapid heartbeat. I remember from when taking the echocardiogram that I was stressed

The heart rate is a measurement of how many times the heart beats in a minute. Physically fit people tend to have a lower heart rate and during intense exercise tend to have lower rates as well. A decrease of heart rate at both rest and at fixed intensity of sub-maximal exercise [7] occurs a few months after an exercise program is begun. One’s heart rate reflects the amount of work the heart must do to meet an increase of demands of the body when engaged in activity. Heart Rate tends to increase proportionally with intensity oxygen uptake [16].