Effects of Aerobic Exercise on Heart Rate Essay

Introduction Our bodies strike to be in balance in order to function properly, and in that respect be many ways the body maintains balance, or homeostasis. Homeostasis is the maintenance of approximately constant conditions in the internal environment. Our normal face regularise is an grammatical case of our body in homeostasis and any sort of change, or stimulus, can exchange it. Exercise, adrenaline in the blood, and a low blood pH are all stimuli that increase the oculus range. Exercise, for example, stimulates stretch receptors in the muscles. These receptors then aim a signal to a part of the brain called the medulla oblongata that receives the sensory(prenominal) input. It then in turn sends nerve impulses to the sinoatrial customer in the life. This node gene consec enumerates an impulse and initiates contraction of the spunk at a quicker pace. Thus, the heart beats faster, which equals an increased heart rate. This is an example of a homeostasis imbalance. The heart reaches homeostasis again when exercise ceases and the heart rate drops plentyward(a) to its basal rate, or its rate at rest. This whole process is an example of a negative feedback circle a stimulus (increased heart rate) sends receptors to the control center (medulla oblongata), which then sends effectors (impulses by the vagus nerve, or the efferent pathway) to the heart to slow the heart contractions, indeed reducing the heart rate and bringing it back to its basal rate.In our experiment we studied heart rate before and aft(prenominal) a outline exercise session. Our guessing is exercise will increase the heart rate, and a negative feedback mechanism will occur to restore the heart rate back to its normal basal rate. Materials Stop watch, metronome, stairsMethods octet subjects took their own resting, or basal, heart rate for 15 seconds while rest up. Some subjects chose to take their heart rate at their carotid artery, and both(prenominal) took their pulse usi ng their radial artery. This number was multiplied by 4 to get beats per minute. This is how all heart rate treasurements were taken passim the experiment. Subjects did exercise session. They walked down 57 stairs and then back up those same 57 stairs for a sum of 104 stair steps. This was make at a pace of 85 beatsper minute. The whole session took 1 minute 45 seconds. Subjects immediately took their heart rate subsequently they completed the exercise. After 1 minute of completing the exercise, subjects measured their heart rate again. This was done at 1 minute separations for a total of 5 heart rate measurements after completing the exercise. All together, subjects took 6 heart rate measurements 1 before the exercise, and then 5 after the exercise. Data/Results See attached graph and table.Conclusion/Discussion The info shows that heart rate increases during and after exercise and begins to drop back down close to the basal rate after rest. The heart progressively decreases after each minute of rest. Our results show a negative feedback mechanism was utilize to control the heart rate after exercise. The increased heart rate stimulated the medulla oblongata which sent impulses to the sinoatrial node of the heart to slow down contractions and decrease the heart rate. Different subjects had differences in the time it took for their heart rate to drop after the exercise, but heart rate decreased nonetheless. Overall, our hypothesis was shown to be correct from the experiment. We chose the heart rate as our variable because it is easygoing to measure and gives clear results. We predicted that the heart would increase after a brief exercise session, and our results matched that prediction. As for other experiments, we could perform different activities or tasks and measure our heart rate after those. We could even hold a heartbreaking/heated discussion and see if heart rate is affected in an intense conversation. There are many different things you could do to rill heart rate, as exercise is just one example.Data distributively subject and their heart rate at certain time interval SubjectBefore exercise0 minutes rest1 min. rest2 min. rest3 min. rest4 min. rest 1100 BPM120 BPM104 BPM104 BPM104 BPM104 BPM21201601561561521483721007680767247212080727272596136124120100100668120727276807601166464646486816084888084Summary statement Heart rate increases during and after exercise and begins to drop back down close to the basal rate after rest.CitationsHeart Rate Regulation in Humans. (2010, January 23). The scholarly person Room. Retrieved August 24, 2013, from http//www.thestudentroom.co.uk/showthread.php%3Ft%3D1059551%26page%3D45&q=&esrc=s&ei=EEIuUtiHKMKUiQL86YDQDQ&usg=AFQjCNGj9jN4mV3pDlB7dF1yuUm0gn81gA