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How does stress affect the body research paper
Physiological responses of the body during exercise
How does stress affect the body research paper
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During exercise, many changes occur in the body to adapt to the added stress. Two of these changes are heart rate and blood pressure. Heart rate is the number of times a person’s heart beats in one minute. A normal resting heart rate is between 60 and 100. Each person has a maximal heart rate that estimated equates to 220 minus their age. Therefore, as the person ages, the estimated maximal heart rate decreases. Blood pressure is the measure of force against the arterial walls from blood as it passes through. It can further be broken down into systolic and diastolic pressure. Systolic blood pressure is the pressure during left ventricle contraction and is read as the top number of blood pressure. Diastolic pressure is the pressure in the arteries while the ventricles are filling in between heart beats and is read as the bottom number. A normal blood pressure readings is a systolic number between 90-120 and a diastolic pressure between 60-80 (Kenney, Wilmore, & Costill, 2015). When a person exercises, the active tissues in the body …show more content…
This force transfers into the arteries and arterioles in other parts of the body as the blood moves away from the heart. Once the intensity drops and the stress on the heart decreases, the pressure in the arteries also reduces due to the less forceful contractions. Therefore, the hypotheses were accepted based on the averages of the data collected during the experiment. However, in order to have more accurate data, a larger sample size would be needed. In addition, using machines to measure heart rate and blood pressure could make the data more accurate than the process that was used in this experiment. Increased accuracy could also have been seen if there were more trials done when taking heart rate and blood pressure during the exercise stages and then averaging those
Blood pressure reflects the pressure that is exerted on the walls of the arteries. Varying with cardiac cycle, high with systole and low with diastole. A measurement of the pressure of the blood in the arteries. As ventricles contract you have systolic blood pressure and when the ventricles relax you have diastolic blood pressure. Expressed as a ratio of the systolic over diastolic pressure external influences like caffeine, nicotine, exercise, emotions, pain and temperature affect blood pressure as it reflects the stroke volume of the volume of blood ejected with each heartbeat. Blood pressure can vary depending on the position of the body and of the arm. (Preassessment Overview, 2003)
The heart rate will be lowest when the subject is relaxed because the heart will have enough blood to pump in less beats per minute. When the subject sits up, it will increase its heart rate. However, the heart rate will be at its highest after the subject had exercised due to the body trying to satisfy itself by sending more oxygenated blood to where it is needed most.
Blood pressure can be a confusing topic to those who do not study the subject. Renee’s blood pressure is 158/97. The top number, 158 is the systolic pressure. Systolic pressure is the highest blood arterial pressure reached during ejection of blood from the heart. The bottom number, 97 is the diastolic pressure (Haiken, M., 2010). Diastolic pressure is the lowest arterial pressure when the ventricles are relaxed. A healthy blood pressure is 120/58 indicating that Renee has elevated blood pressure (How to Understand Blood Pressure Readings, 2016)
The data recorded supports the hypothesis, as during the trials the heart rate, breathing rate increases from resting body results as well as that the body temperature remained at an constant temperature. Many changes occurred in heart rate, breathing rate and body temperature. As seen in graph 1 the heart rate was very unstable throughout the trials. This is due to homeostasis. The heart rate rapidly increases in all the trials, but then slowly decreases after the 5-minute resting period. The heart rate increases while doing exercise, as the heart speeds up the oxygen to the muscles. As seen in graph 2 the breathing rate increase while doing exercise, but then later decreases to maintain a stable breathing rate. The breathing rate in this
Our experiment tested the effects of exercise on blood pressure. My partners and I would measure a test subject’s blood pressure after they had completed three exercises, walking, jumping, and performing jumping jacks until their blood pressure gauge reached 50 mmHg. We recorded jogging with the greatest change in both systolic (change in 26) and diastolic rate (change in 8). Our hypothesis was wrong as we thought jumping jacks would cause the great change as it requires the exercise of the entire body including all four limbs.
The purpose of this experiment is to find out and record the response of the blood pressure on the cardio exercise when working under high and low intensity.
AIM: - the aim of this experiment is to find out what the effects of exercise are on the heart rate. And to record these results in various formats. VARIABLES: - * Type of exercise * Duration of exercise * Intensity of exercise * Stage of respiration
Hypertension or high blood pressure is a condition in which the blood vessels have continually raised pressure, placing them under increased stress. Every time your heart beats; it pumps blood into the vessels, carrying blood throughout the body. Blood pressure is created by the force of blood pushing against the arteries as it is pumped by the heart. The bottom line, the higher the pressure, the harder the heart has to pump. Normal adult blood pressure is about 120 over 80. The top number represents the amount of pressure in your arteries during contraction of your heart muscle or systolic pressure, and the bottom number represents when the heart relaxes or diastolic pressure. Anything above 140 over 90 generally indicates
The prediction that as Cardiac Output increases, Total Peripheral Resistance must decrease for Mean Arterial Pressure to increase was not supported by the results of the experiment. For the results to concur with the prediction, Chase’s Total Peripheral Resistance needed to decrease as Cardiac Output increased for Mean Arterial pressure to increase. Improvements to the design of the experiment could include: a greater sample size, higher and increased number of exercise intensities (i.e. 50rpm, 70rpm, 100rpm, and 130rpm). Most of the quantitative data adds up to a well-supported prediction, but simple errors in the experiment such as too low of an intensity could have interfered with the final calculations. Pulse pressure in Chase’s Level 1 bout decreased, causing confusion. A greater sample size of subjects may help support the hypothesis better by eliminating anomalies in the data. More exercise intensities could show a more consistent overall change in each of the measurements. Stroke volume was also something not discussed; because Chase’s heart rate was significantly lower at rest, the stroke volume may have been higher than
This experiment made use of a single male subject who was 20 years old, with a height of 190.5 cm and weight of 104 kg. The study consisted of obtaining heart rates after the following conditions 1) after one minute in the supine position, 2) immediately after moving to a sitting position, 3) one minute after moving into a sitting position, 4) immediately after moving to a standing position, 3) one m...
...iovascular system sedentary periods become even easier for the heart by comparison. The heart eventually becomes more efficient, and no longer needs to beat as quickly to supply the body with blood while at rest. Stroke volume increases at rest. Resting heart rate is able to slow down because the heart is now trained to pump a larger quantity of blood with every beat. Improved circulation. In response to the need to supply the muscles with more oxygen during exercise, the body increases its number of capillaries, the smallest blood vessels in the body. Existing capillaries also open wider. Blood pressure decreases by up to 10 mmHg. An mmHg is a unit used for measuring pressure levels. Blood volume increases. The body produces a greater number of red blood cells in order to keep the muscles supplied with oxygen during heavy exercise (Fitness Health & Wellness, 2010).
Cardiac Output: (Q= SV*HR) increases with exercise intensities and allows more blood to pass through the body to meet the demand of the muscles’ increased demand for oxygen. Once cardiac output is at its max, it is similar to VO2max and typically plateaus. Since this is a relationship between both hearth rate and stroke volume; the initial increase of cardiac output begins with the increase heart rate, which then, furthers the increase of stroke volume at higher intensities.
The hypothesis stated that as the intensity increases, then the heart rate will also increase. This is supported by the data collected. The graph shows that intensity and heart rate have a positive correlation which means that they will both increase at the same time in a linear fashion, validating the hypothesis. The r2 value of 0.9791 is also very close to 1 and the data points are near the trendline, meaning that the variables have a strong positive relationship. However, the error bars and standard deviation also demonstrates something that the hypothesis did not predict. The fact that the standard deviations of the lowest and highest intensity were lower compared to the other intensities in between suggest that there was less of a room for the heart rate to vary by increasing and decreasing. The lowest intensity did not result in a significant increase in heart rate, and as the heart rate after exercise cannot be lower than the resting heart rate, the spread of the data collected at the intensity of 100 metronome bpm is less. The standard deviation increases as the intensity increases due to the gap in exercise heart rate and resting heart rate. However, after the highest standard deviation (12.86) was reached at the intensity of 140 metronome bpm, the spread started to decrease. Eventually, at the
The human body response of the cardiovascular and respiratory systems to the demands of exercise.
Moreover, heart rate, also known as pulse. A normal heart rate of people is different and it depends on the age, body size, heart condition, weather the person is sitting or moving. However for adults 18 and older, a normal heart rate is between 60 and 100 beats per minutes. (1)