HMS, BM EQ-Bank 441 MC

When presenting findings from an investigation on the physiological responses to aerobic training, which of the following would be considered a limitation of the study?

Using a control group who did not participate in the training program
Testing participants' aerobic capacity before and after the training program
Recording heart rate, blood pressure, and perceived exertion during exercise
Having a small sample size of only 5 participants

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Consider Option D: Having a small sample size of only 5 participants

A small sample size is a valid limitation that restricts the generalisability of findings and statistical power.

Other Options:

A is incorrect: Using a control group is a strength, not a limitation, of an experimental design.
B is incorrect: Testing before and after the program is appropriate methodology, not a limitation.
C is incorrect: Recording multiple physiological measures provides more comprehensive data, making it a strength rather than a limitation.