Heart Rate
The aim of this experiment is to find out how different intensities of exercise effect the heart rate I will measure it in beats per minute using a polar heart rate monitor. I predict that as I increase the intensity of the exercise I do, that my heart rate will increase. This is because as I exercise more intensely I will need more blood to my muscles to supply oxygen and take away carbon dioxide; therefore my heart is going to have to beat faster to keep up with oxygen demand, so oxygen debt doesn't occur and so that carbon dioxide can be taken away as it is a waste product. For this I can use one of three choices these are;-1. Work rate, as in the speed I will go on the running machine and change for different intensities. -2. Time of work, meaning how long I will work for, and change for different time intensities. -3. The work load I will run with. I could change this for different intensities. I will use the work rate as my variable to manipulate; therefore I will be changing the speed at which I run in Km/h. This means that I will not change the time I work for or the work load I work with.
Then when all data is gathered I will figure out the average of each three on different intensities, I will round the average up or down according to the figure. - I will make sure that my shoe lasses are tied up properly to insure that I don't trip up. This heart rate will come across by chemoreceptors and baroreceptors in blood vessels. Then after each two-minute exercise I will have recovery time and as my recovery rate varies due to the intensity of the exercise I do, I will not do another experiment until my heart rate has returned to the normal heart rate for myself. The myogenic stimulation starts at sino-atrial node with a cardiac impulse. The chemoreceptors will detect a change in the pH of the blood, and when exercise occurs it detects drops in pH as more carbon dioxide is being produced. Then the medulla sends a message along the nervous system to the sino-atrial node in the heart, this will also send a message to the adrenal gland. When there is an oxygen debt the heart will increase it's beats per minute to stop the build up of lactic acid and it will take away the carbon dioxide and exhale the carbon dioxide via the lungs. Safety: During the experiment I will take the following safety measures to ensure I don't get injured; - I am asthmatic, so I will make sure that I have my ventoline inhaler on me all the time. Once I have strapped the polar heart meter to my self by remote control it will link itself up to the running machine. I will use the same equipment throughout the experiment, this means that my experiment will be a fair test throughout; I will use the same clothes, shoes and running machine throughout the experiment. I will measure my heart rate in beats per minute bpm. Values and Ranges: I will do five different intensities on the running machine, therefore meaning that I will do five different speeds (in Km/h) on the running machine. I will always make sure that before I start my exercise, that my heart rate is at its normal rate, therefore it would be a fair test as my heart rate wouldn't start higher than normal therefore giving a higher result. I will also throughout the experiment be standing, because then my blood will go to the same parts of the body with the same amount of beats per minute.
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Acceptance Essays
