Is there anything that I will change during my investigation?
The only thing that I will change during this investigation is the period of time that I exercise for.
So what do I think will happen?
I predict that the heart rate will increase when you exercise. I also think that the longer you exercise for the higher your heart rate will become.
I also predict that the longer you exercise for, the longer it will take the recovery pulse to return to the resting pulse.
Why do I think this is going to happen?
I think this will happen because the sort of exercise that I am carrying out (running) is an aerobic exercise which increases the use of the heart and muscles. During exercise there is an increase in cell respiration, so the level of carbon dioxide in your blood rises, to overcome this rise in CO2, the lungs breath faster and deeper, in order to take in as much O2 as possible and also so the blood can take away more CO2 during the exercise. By doing this your heart rate increases, causing the rise of heart rate during exercise. Your muscles also receive more oxygen and glucose to enable to exercise without getting lactic acid, where the glucose is unable to breakdown, so there is less energy, for the completion of exercise.
The more exercise you do the more oxygen and glucose is used, so to get back to your resting pulse, at the start of the exercise, it will take longer in the increase of exercise. As during the resting period your heart still continues to beat fast, and the lungs need to take in more oxygen than usual to continue, to remove the CO2 and give the muscles oxygen and glucose,
until the time at which all the necessary oxygen and glucose is in the body.
What references did I use to write this plan?
To get some information and background on exercise I used one book:
PE to 16 Sally Fountain and Linda Gee
MY RESULTS
All of my results are taken down in Beats per Minute (BPM).
So what do my results show?
My results show that exercise DOES increase the heart rate. My results also show that the longer you exercise for the higher your heart rate is and the longer you exercise the longer it take for your recovery pulse to return to its starting rate.
Why does this happen?
My heart rate increases when I exercise because I am using more energy and to keep up with the needed energy, my heart has to beat faster so that the blood can be quickly circulated and in that process delivering the oxygen and glucose to all the necessary muscles. As you can see from my results the longer I exercise for the higher my heart rate is, this is because my muscles are being used for a longer period and they use more energy as they become more tired.
My recovery pulse is higher the longer I exercise for and also the higher heart rate I get. This is because my heart rate takes time to get back to its resting pulse. My muscles are still demanding oxygen and energy, as they still need to stop the possibility of getting lactic acid through the lack of oxygen.
Was my Prediction correct?
My prediction was correct. The 3 predictions that I made were all proven right by my results. As my results showed the increase of heart rate when exercising, the longer you exercise for the higher your heart rate and also the longer you exercise for the longer your recovery pulse is.
So is my data reliable?
I think my data is very reliable, as I took down true results and didn’t impose any false ones. It is also very useful information and you can learn a lot about the increase of heart rate when exercising.
Was the investigation carried out accurately?
I think my investigation was very accurate. My results show no odd patterns, which suggests accuracy. I took down my resting pulse before every exercise and had a break after I had taken my recovery pulse, just in case my heart rate was still high after the previous period of exercise.
Were there any odd results and if so why do you think this was?
I didn’t have any odd results.
How could this investigation be improved?
To improve this investigation I think I would probably have gaps of 30 seconds between each period of exercise, because the rise in heart rate was very high, so a smaller rise would give me better results and also they would be better to get a conclusion from.
So what is my final conclusion?
I think that exercise does increase your heart rate. This is proven by my results and graphs. I also believe that the longer you exercise for the higher your heart rate and also the higher your recovery pulse will be.