What must divers consider about their physical health during a self-assessment?

During a self-assessment, divers must carefully evaluate any pre-existing medical conditions because these conditions can significantly impact their ability to dive safely. Understanding one’s physical health is fundamental in ensuring diver safety and performance underwater. For instance, conditions such as asthma, heart disorders, or previous surgeries can affect how a diver's body responds to changes in pressure, underwater environments, and physical exertion.

Recognizing pre-existing medical conditions allows divers to take necessary precautions, seek medical advice if needed, and make informed decisions about whether they are fit to dive. Many diving organizations require a medical clearance for individuals with certain conditions before they can participate in diving activities.

While swimming speed, the amount of equipment carried, and the time spent underwater may be relevant for other aspects of diving, they do not directly address critical health-related concerns that could endanger a diver’s safety. Focusing on physical health and pre-existing conditions is crucial to ensure that divers can engage in the activity responsibly and without excessive risk.