Which three factors adversely affect a diver's air consumption rate?

The factors that adversely affect a diver's air consumption rate include large physical size, high anxiety, and poor fitness level. A larger physical size typically requires more oxygen due to increased metabolic demands, leading to higher air consumption rates.

High anxiety can cause a diver to breathe more rapidly and shallowly, which increases air consumption. Anxiety also often leads to less efficient diving techniques and more energy expenditure. A poor fitness level means that a diver has less cardiovascular endurance and can tire more easily, resulting in increased breathing rates during exertion.

In contrast, elements such as good physical condition and lower anxiety levels contribute positively by enhancing efficiency and stability in breath control, thus optimizing air consumption underwater.