A nurse is caring for a client who is scheduled for an exercise stress test. Which of the following comments made by the client should indicate to the nurse that the client requires further teaching?

Choice A reason: Getting 8 hours of sleep before an exercise stress test is appropriate, as rest ensures accurate results by minimizing fatigue-related heart rate variability. This comment reflects proper preparation, not requiring further teaching, as adequate rest supports reliable cardiovascular response during the test. Choice B reason: Skipping coffee the morning of the test is correct, as caffeine can elevate heart rate and blood pressure, skewing stress test results. This comment indicates proper understanding of preparation, not requiring further teaching, as avoiding stimulants ensures accurate assessment of cardiac function during exercise. Choice C reason: Taking heart medications the morning of the test requires clarification, as some (e.g., beta-blockers) may blunt heart rate response, affecting test accuracy. The client needs teaching to confirm with the provider which medications to hold, ensuring the stress test accurately evaluates cardiovascular response to exercise. Choice D reason: Not smoking prior to the test is appropriate, as nicotine can increase heart rate and blood pressure, skewing results. This comment reflects correct preparation, not requiring further teaching, as avoiding smoking ensures the stress test accurately assesses cardiac function without external influences.