Aerobic Lab

Using the lab activity, observe and record the physiologic changes that occur during exercising using the following chart:

In this assignment I will be introducing a formal report that is based on an investigation into how the body responds to exercise and which analyses the results from the investigation. The investigation involves myself and other pupils in my class. I will be doing the Harvard step test. the other pupils in my class will be monitoring my heart rate, breathing rate and temperature before and after the test.

4) Compare and contrast oscillations in heart rate observed at rest (Activity 1), during exercise and recovery exercise (Activity 2). Is the relative magnitude of the oscillations the same? Provide a physiological explanation in your answer.

P6- follows guidelines to interpret collected data for heart rate, breathing rate and temperature before and after a standard period of exercise

Two intervals did show a significant shorting post exercise. Besides the RR interval, the other recorded interval which contained a marked shortening after exercise was the TP interval. To understand why the TP interval is shortened when the heart rate increases and lengthened when the heart rate slows, one must first understand what the TP interval is. The TP interval, which is the the interval between the end of the

Exercise increases heart rate by a process of sympathetic autonomic stimulation. Sympathetic (adrenergic) nerves increase the excitability of the sino-atrial node and reduce the P-R interval .As exercise continues, the physiological changes in the body are continuously monitored by a number of physiological systems and the balance of activity of the sympathetic system (speeding up) and the parasympathetic system (slowing down) is constantly adjusted. When exercise is over, the heart rate does not drop immediately as the body has to undergo a period of re adaption to return to the resting state.

7. After obtaining 10-20 seconds of stable heart rate values, rise rapidly to a standing position. Continue to record until the baseline heart rate has been achieved or until the end of the run. Data will be collected for 400 seconds.

The graphs also show that Sara’s heart takes the longest to recover after exercise, followed by Jonathan and then me. This means that from these results, Sara is the most unfit and I am the fittest out of the three of us. Since all three of us did the exact same kind of moderate and strenuous exercise it shows that Sara’s heart is not as used to

During intense activites, anaerobic energy is the major contributor for 1 to 3 minutes. Because of intense muscle contractions, there is a limited oxygen supply from the constricted blood vessels.

Research Question: What is the effect of practicing aerobic sports on a daily basis, on the recovery heart rate of people?

ATP - Adenosine Triphosphate: is a complex chemical compound, which is formed with the energy that is released from food and stored in all cells, but particularly muscles. Only from the energy released by the breakdown of this compound can the cells perform work. The ATP-PC System is an anaerobic process which means that fast bursts of energy for short, powerful bursts are produced and there is no oxygen involved in this process. www.ptdirect.com/anatomy-and-physiology/energy-systems/the-atp-p-system The fuel source for this energy system is Creatine phosphate. A muscle cell has some amount of ATP within it that it can use immediately, but not very much. To replenish the ATP levels quickly, muscle cells contain a high-energy phosphate compound called creatine phosphate. The phosphate group is removed from creatine phosphate by an enzyme called creatine kinase, and is transferred to ADP to form ATP. The cell turns ATP into ADP, and the phosphagen rapidly turns the ADP back into ATP. As the muscle continues to work, the creatine phosphate levels begin to decrease.

A: I currently have medium levels of activity. I defiantly need to do more aerobic exercises to improve my breathing and heart rate, during physical activity. I participate in moderate to high activity about three or four times a week. Two of those times I am at a two hour volley ball open gym, and the other times I am playing volley ball with friends or practicing more. This sport involves a lot of stops and starts for pushing your self,

The exercise I choose to do to elevate my heart rate into its target zone into is running 10 minutes. By knowing my maximum and target exercise-induced heart rate I can know when to slow or intensify the exercise so that I will not hurt myself. My heart rate exceed its target zone at a few times during my exercise. This can be due to the fact that I may have over exerted myself. After the exercise I felt very winded and exhausted thus exceeding my heart rate. My heart rate always reached its target zone during the exercise. During the pre-exercise my heart rate always fell with 60 to 72 bmp. It also noticeable that post, during, and after the exercise my heart range is between 50 and 185 bmp. If this exercise was to be continued on this will

Introduction: In this experiment, cardiovascular fitness is being determined by measuring how long it takes for the test subjects' to return to their resting heart rate. Cardiovascular fitness is the ability to "transport and use oxygen while exercising" (Dale 2015). Cardiovascular fitness utilizes the "heart, lungs, muscles, and blood working together" while exercising (Dale 2015). It is also how well your body can last during moderate to high intensity cardio for long periods of time (Waehner 2016). The hypothesis is that people who exercise for three or more days will return to their resting heart rate much faster than people who only exercise for less than three days.

The controlled variable included the exercise bike and heart rate monitor. There are several limitations, systematic and random errors that should be considered when interpreting these results. (4) The controlled variables were not tested before this experiment to see if they were working and reliable. Figure 2 heart rate was quite inconsistent and did not follow the pattern of the other results, which maybe suggest a random error with the heat rate monitor. A systematic error could include the fitness of the participants. One of the test subjects is an endurance athlete and the other does not compete in any sport. This would affect the results because for the endurance-trained athlete, from their training they increase their cardiac output results from a substantial increase in maximal stroke volume. In untrained persons, cardiac output increases in response to exercise primarily by an increase in heart rate. The endurance-trained athlete does so mainly by an increase in stroke volume. Simply meaning that although both participants are doing the same cadence and length the endurance athletes skewers the results by already having an increased rate in stroke volume. Another systematic error may include the rate of perceived effort. For the most accurate results, the measured maximum heart rate would be necessary to give an accurate cadence to ride at.