Final answer:
Blood pressure should be monitored every 1-2 minutes during a symptom-limited maximal exercise test.
Step-by-step explanation:
During a symptom-limited maximal exercise test, blood pressure should be monitored at regular intervals to ensure the safety and effectiveness of the test. The appropriate interval for monitoring blood pressure during this type of exercise test is generally every 1-2 minutes. This frequent monitoring allows for early detection of any abnormal blood pressure responses that may require intervention or cessation of the test.