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Effect of Exercise on Heart Rate Investigation

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Daniel Lewis, 10HR Effect of Exercise on Heart Rate Investigation - Research Exercise can affect respiration and the heart rate dramatically. Muscles need energy to maintain their functions. This energy is provided through a process called respiration. When the heart is at resting rate enough oxygenated blood is being pumped around the body for a stable state of aerobic respiration. Resting rates vary between different people. The healthier a person is, the lower their heart's resting rate is. Aerobic respiration is the release of energy from glucose in the presence of oxygen. In our bodies tissues glucose can be broken down to release energy, which may be used for bodily functions such as muscle contractions. The general equation for the process of aerobic respiration is: Glucose + Oxygen = Carbon Dioxide + Water + Energy Aerobic respiration takes place in almost all living things. The waste products of the process are Carbon Dioxide, excess water and energy. The Carbon Dioxide and water can be easily excreted and the energy is used up in the body where it is needed. During exercise the heart rate may increase. Aerobic respiration will prolong if the necessary amount of oxygen helps produce enough energy for the muscles to continue functioning. Anaerobic respiration occurs when muscle cells do not receive enough oxygen to produce the energy needed. This occurs during vigorous exercise. ...read more.


Begin the session of exercise and maintain fluent and steady exercise. Continue exercising for fifteen minutes without stopping. The heart should now be beating fast and lactic acid may have developed from anaerobic respiration. At the end of each exercise session no fluids or food of any kind should be swallowed. All attention must now be paid on the heart rate. No movement, communication or function of any kind should take place. As soon as exercise stops the heart rate must be measured. Count the hearts beats for 15 seconds and then multiply them by four. Record your result in the units BPM (beats per minute). Repeat this procedure for measuring the heart rate for 15 minutes after exercise, recording each result. To increase the accuracy of the conclusion of the entire experiment is, it should be repeated. Have an exercise session every twenty-four hours over the course of five days. Recording the results of each session is essential. The routine before, during and after each exercise session should be identical to the previous session. It is vital that each exercise session is carried out with safety precautions, precision and a great deal of care. Evaluation Overall the entire experiment was a big success. But several small problems presented themselves, posing a slight threat to the accuracy of my results. I used an exercise bike for apparatus in the investigation and on the second day of the experiment I made a foolish mistake. ...read more.


Comparing all five days of the experiment, half way through the measuring process my heart rate was at a minimum of 84 BPM, my resting rate. The maximum was 92 BPM. The average within the five-day experiment was 90 BPM. Some days after exercise my heart rate would be higher than my resting rate but it didn't decrease over time; it stayed the same for several minutes. For instance, on the fourth day, after exercising, my heart remained at 88 BPM for three whole minutes. This could be because during that time I wasn't breathing in enough Oxygen to continue the effective break down of my lactic acid. Or maybe it was because the same amount of Oxygen was required to work on breaking down the lactic acid for three minutes. My heart always resumed resting rate within fifteen minutes after exercise. The least amount of time my heart took to reach my resting rate, at 84 BPM, was eight minutes, on third day of the experiment. The average time for my heart to reach resting rate after exercise was eleven minutes. If I were healthier then not only would my resting rate have been lower than 84 BPM, but my heart would take less time to reach resting rate after exercise. Straight after my exercise sessions my muscles always seemed to feel fatigued, this was because of the lactic acid build up in my muscles. But given a fifteen-minute period of Oxygen supply the pain disappeared, as did the lactic acid. ...read more.

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