Which of the following is NOT a common early intervention measure?

Ignoring facial expressions of concern is indeed not a common early intervention measure because effective lifeguarding requires vigilance and responsiveness to the behavior and signals of swimmers. Lifeguards are trained to be observant and to recognize when swimmers may be in distress, which can often be indicated through their facial expressions and body language. Therefore, acknowledging and acting upon such expressions is crucial in preventing incidents before they escalate.

In contrast, asking swimmers to follow lane rope signs, stopping a swimmer before they reach the deep end, and checking for swimmers showing signs of distress are all proactive approaches that help ensure the safety of individuals in aquatic environments. These actions demonstrate a commitment to monitoring swimmer behavior and taking appropriate steps to prevent accidents or emergencies, aligning with the responsibilities of a lifeguard in maintaining a safe swimming environment.