Final answer:
Delayed onset muscle soreness (DOMS) is not considered a red flag symptom during an initial meeting.
Step-by-step explanation:
When conducting an initial meeting with a potential client, it is important to ask if they have been experiencing any red flag symptoms. Red flag symptoms are warning signs that may indicate a serious underlying health condition. Out of the given options, delayed onset muscle soreness (DOMS) is not considered a red flag symptom.