Exercise Ventilation and Blood Lactate Questions
Purpose:
1. Write 1-2 sentences about the purpose of this lab including the concepts you were
trying to test. (1pt)
Methods:
2. Write 2-4 sentences about the methods you used to collect the data. Include
increments by which you increased the intensity of test, the length of the
stages/time periods of all measurements. Make sure you include all
measurements that you took and the equipment that you used. (2pts)
Results:
3. Using an XY scatter plot, graph VE (y-axis) vs. HR (x-axis) during exercise. To
the best of your ability determine a ventilatory threshold. At what HR did the
threshold occur? Indicate the ventilatory break point (threshold) on the graph by
drawing two fitting lines and labeling the ventilatory threshold at the intersection
of these lines. Write 1 sentence about the graph as a figure legend. (3 pts)
4. Graph blood lactate vs. HR. Draw lines to identify the anaerobic threshold and
label the threshold on the graph. At which heart rate did the threshold occur and
to which workload does this correspond? Write 1 sentence about the graph as a
figure legend. (3 pts)
5.
a. Calculate the difference between the HR at the ventilatory threshold and at
the anaerobic threshold. (0.5 pt)
b. Calculate the Percentage (%) of maximum age-predicted heart rate at
which the anaerobic threshold occurs. (0.5 pt) This may be a good
indicator of the percent of VO2max at which the anaerobic threshold
occurs.
Conclusions:
6. What is the link between the ventilatory threshold and the anaerobic threshold?
Explain this in terms of physiology and the cause(s) of each threshold. (3 pts)
7. Assume a second test of our subject is done in a month. If the anaerobic threshold
shifts to a higher workload what should happen to the ventilatory threshold (right
shift or left shift of the threshold)? What stimulus may have caused this shift to
occur? (2pts)