PSK4U U4A3A1-Lab Activ PDF

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Lab Activity-Time to Get Your Heart Pumping

Exercise Intensity

Heart Rate (HR)

Stroke Volume (SV)

Cardiac Output (Q)

Rest

84

60 mL/beat

5 040 mL/min or 5.04 L/min

1min of light squats

100

110 mL/beat

11 000 mL/min or 11 L/min

1 min of intense squats

124

130 mL/beat

16 120 mL/min or 16.12 L/min

1. Calculate what the cardiac output (Q) would be in L/min for each of the 3 observed activities. Q= SV x HR Q of rest= 60mL/beat x 84 beats= 5.04 L/min Q of 1 min of light squats= 110mL/beat x 100 beats= 11 L/min Q of 1 min of intense squats= 130 mL/beat x 124 beats= 16.12 L/min For rest the cardiac output was 5.04 L/min, for 1 minute of light squats it was 11 L/min, and for 1 minute of intense squats it was 16.12 L/min. 2. What is the relationship with between Q and intensity of exercise? The value of Q increases as the intensity of exercise increases. 3. What conclusions can you draw about the relationship between Q and exercise intensity? I can conclude that exercise intensity directly affects the value of Q, since in the lab activity the value of Q would increase if exercise intensity increased. This is because both of the values used to determine Q (heart rate and stroke volume) increase, causing Q to directly increase as well since the value of Q is a product of the two variables. If someone’s exercise intensity were to decrease, the value of Q would also decrease since heart rate and stroke volume would be decreasing too. 4. 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? By doing this physical activity lab, it helped me better understand cardiac output since I was physically moving and feeling my body get warmer as both my heart rate and stroke volume increased, causing my cardiac output to increase to meet the demand for more oxygen. By being able to do the physical movement myself, it helped me to easily understand how exercise intensity connects with cardiac output....