Final answer:
Both women and men of equivalent physical fitness are at similar risk for altitude sickness, nitrogen narcosis, and diving accidents, as these conditions depend more on individual health and behavior, not gender.
Step-by-step explanation:
Women do not experience a greater risk than men of equivalent physical fitness for altitude sickness, nitrogen narcosis, or diving accidents. This is because the risk factors for these conditions are related more to individual health, behavior, and environment rather than gender. Altitude sickness can occur in anyone who ascends to high altitudes too quickly, without allowing the body time to acclimatize.
Nitrogen narcosis, a temporary state of confusion caused by breathing nitrogen under pressure, can affect divers regardless of gender. Similarly, diving accidents are generally the result of poor planning, lack of training, or equipment failure, and these risks are equal for both men and women with similar levels of diving experience and physical fitness.