Cardiorespiratory Response to Exercise Lab PSK 4U NGDHS – S. Kelly

Background We have been discussing the body’s response to exercise, with specific emphasis on: Cardiac output Heart rate and stroke volume The body’s demand for oxygenated blood The effects of training on the body’s responses How warm up and cool down can affect the body’s response to exercise

Activity and Procedure Two groups of students will perform a sub-maximal V-O2 test Students will start the test at different points in the test: First group will start from level 0 (standard start) AND will consist of both “trained” and “untrained” participants. Participants will also record their HR pre- and post-test Second group will start from level 40 AND will consist of both “trained” and “untrained” athletes. Participants will also record their HR pre- and post-test Results (level where each participant finishes) will be recorded.

Hypotheses How will the results look within each group (trained vs. untrained in each group)? How will the results look when comparing the two groups? What (if any) differences will appear within each subset of athletes (trained OR untrained) when comparing the subsets using their starting point? Predict the top 3 scores for trained athletes under each of the two testing conditions. How do the examiners (us) identify “trained” and “untrained” athletes? Create some objective criteria for each category.

Observations NOTE: In order to extrapolate V-O2 max, results MUST be recorded in terms of the OLD test: number of levels + number of shuttles. Calculate the MEAN value for the results of each subset of participants (there are 4 subsets) Calculate the MEDIAN value for each of the subset of participants Graph the results for each of the two testing conditions. If possible, use two different colours when representing the score of a female athlete and a male athlete. Predict a V-O2 max for each of the scores and repeat the graph of the raw scores for each of the testing conditions. Again, if possible use colours to differentiate genders. V-O2 max calculators: http://www.topendsports.com/testing/beepcalc.htm https://www.easycalculation.com/health/beep-test-calculator.php

Disccussion Questions Using a comparison and general terms, compare the results under each of the two testing conditions. Be sure to discuss the maximum and minimum values. What are the main factors you believe influenced the results you outlined in question #1? Define and include a visual representation of the Borg Scale. Be sure to include a definition for “RPE”. How would the maximum values, minimum values, and median values correspond on the Borg scale? If need be, you may ask actual participants (after showing/explaining the Borg scale to them).

Discussion questions continued What influences the stage at which participants quit this test (in other words: is this an accurate V-O2 max test)? Explain your answer thoroughly. What, if anything, can we learn from the extrapolated V-O2 max scores? At what point would you predict that cardiovascular drift would start to affect the participants’ HR? Would this change under the two different testing conditions? Explain your answer. Without necessarily graphing the numbers (you can if you’d like), do you notice any patterns in the recorded pre-workout and post- workout HR measurements for each of the two testing conditions? Try to explain your answer.

Last slide of discussion questions Briefly describe the difference in progression through the three energy pathways under each of the testing conditions. How does this (if at all) explain the difference in results under the two testing conditions? What are some possible avenues for further study and/or areas of interest after completing this lab?

Two Content Layout with SmartArt First bullet point here Second bullet point here Third bullet point here Group A Task 1 Task 2 Group B