How exercise affects pulse rate.

aerobically. Anaerobic respiration is less efficient than aerobic respiration. Oxygen is needed to break down lactic acid to carbon dioxide and water. The amount of oxygen needed to get rid of the lactic acid is called the oxygen debt, which must be paid off immediately. This is why your heart rate stays high and it takes a while to get your breath back after you have stopped running - oxygen is still being delivered to the muscles to oxidise the lactic acid. The fitter you are, the quicker you recover.Respiration the process that releases energy from food. Substances from our food is oxidised to give carbon dioxide and water, also energy is transferred. Glucose is the main substance that is oxidised. The overall equation for respiration is:C6H12O6 + 6O2 = 6CO2 + 6H2O + ATPGlucose + oxygen = carbon dioxide + water + energyWhat equipment will you use?I will use a step, a stopwatch, and I will also wear trainers.How will you carry out your experiment?„h First of all I will take my pulse rate for a minute.„h I will then do step-ups at a constant rate for 1 minute.„h After, I will take my pulse rate again for 1 minute.„h Then I will allow pulse rate to return to normal.„h I will then do step-ups for 2 minutes.„h Take pulse rate again for 1 minute.„h Repeat experiment, going up in consecutive numbers until doing step-ups for 5 minutes.„h Repeat experiment twice.How will you make it a fair test?What will I change? What will I keep the same?„h I will change the amount of time doing exercise. „h I will use the same step during the experiment.„h I will always take my own pulse rate and I will make sure that I start my exercise using the same starting pulse rate.„h I will get the same person to take the time while I exercise.How will you make sure that your experiment is safe?I will make sure that I am wearing trainers, as otherwise I will hurt my ankles. I will also make sure that the step is on flat floor.ResultsAmount of time(min) Pulse rate 1(BPM) Pulse rate 2(BPM) Average(BPM)Resting pulse 70 72 711 100 110 1052 120 125 1233 140 139 1404 170 157 1645 190 183 187Analysis and conclusionsDid you observe any trends or patterns in your results?I noticed that as I increased the amount of exercise that I done, my pulse rate increased also. My pulse rate increased at a steady rate, roughly going up at 20 beats per minute.What does your graph tell you?My graph tells me that as the minutes of exercise increase so does my pulse rate. The graph shoes that by doing five minutes of exercise, it is not likely that I have reached my maximum pulse rate.Explain your results using scientific ideas.My results show that by increasing the amount of exercise, my pulse rate increases also. The more exercise that is done means that respiration has taken place. Blood is pumped around the body faster to transport the waste carbon dioxide. This is what causes the increase in heartbeat. Do your results agree with your prediction?My results fit in with my prediction. I was breathing more deeply and therefore taking in more oxygen. As I was using more energy, the body needed more oxygen for respiration to take place. The blood is pumped around the body faster to get rid of the waste carbon dioxide therefore giving me a faster pulse rate. The heart pumps blood around the body faster in order to get rid of the waste carbon dioxide. Oxygen for respiration has to be obtained from the surroundings. You also have to get rid of the carbon dioxide produced during respiration. This is because carbon dioxide is toxic to us and it will cause cramp. Gaseous exchange is the process of obtaining oxygen and getting rid of carbon dioxide. This gas exchange happens at a respiratory surface, so the heart pumps the blood around the body at a faster rate to get to the lungs so diffusion can take place. This is known as respiration and it is the process of converting glucose to energy.Evaluation Do you think your experiment was a fair one?I do think that my experiment was fair. I repeated the experiment twice and in between I always let my pulse rate return to normal. I kept the step at the same height and the same person took the time.Did all of your results fit the general pattern or trend?Yes, all of my results fit into the general pattern.Do you think your results were reliable?I think that my results are reliable as I followed my plan. I also made sure that it was a fair test. The same person took the time for me and I done the exercise at a constant speed.Was you procedure suitable? Could you improve your experiment?I feel that my procedure was suitable because I thought about my plan and followed it carefully. I also repeated my experiment twice to make sure that my results were not anomalous.I could improve my experiment by making sure that when I repeat the experiment, my pulse rate is the same as the first I done it. This would give me more accurate results.