Reference no: EM133748232
Problem
A. Create a chart similar to the one below to plot your values during the steps of the lab.
B. Calculate your cardiac output using this equation (Q = SV x HR) and the supplied average stroke volumes taken from this chart, along with your own observed heart rates. (roughly for a 17 year old athletic girl who is short)
C. Follow the steps below and answer the questions at the end of the lab.
Not really sure how to measure your heart rate by using your own fingers and a clock or timer? Take a minute and watch this:
Sample chart and needed information:
|
Exercise Intensity
|
Heart Rate (HR)
|
Stroke Volume (SV)
|
Cardiac Output (Q)
|
|
Rest
|
...
|
60ml/beat
|
...
|
|
1 min of light squats
|
...
|
110 ml/beat
|
...
|
|
1 minute of vigorous squats
|
...
|
130 ml/beat
|
...
|
Step I:
Sit in a chair for 2 minutes and at the end of the 2 minutes record your heart rate for an entire minute. Record your heart rate in beats per minute for your "rest" observation.
Step II:
Now you are going to perform 1 minute of gentle squats by getting up out of your seat and slowly sitting back down. Once the minute is over record your heart rate for 1 minute and record it for your "1 minute of light squats".
Step III:
Rest for 2 minutes before moving on to step 4.
Step IV:
You are now going to perform 1 minute of high intensity squats by getting up from your chair and lowering back down so that you just touch your gluteus maximus muscle to the chair before returning to the upright position. Perform as many of these movements as you can for the entire minute. Once the minute is up immediately measure your heart rate for exactly 1 minute and record the value in the "1 minute of vigorous squats".
A. Calculate what the cardiac output (Q) would be in L/min for each of the 3 observed activities.
B. What is the relationship with between Q and intensity of exercise?
C. What conclusions can you draw about the relationship between Q and exercise intensity?
D. Remember when you learned about the fundamental principles of HPE in Unit 1 Activity 2? This is the first time in this course that you have used fundamental principle #2, "Physical Activity as a vehicle for learning". How did doing this physical activity lab help you to better understand the Cardiac Output?