According to the talk test method, what indicates a moderate level of activity?

The talk test method is a simple way to gauge exercise intensity based on a person's ability to speak during an activity. When achieving a moderate level of activity, individuals should be able to carry on a conversation comfortably. This means they can talk, but may not be able to sing, as singing generally requires a higher oxygen demand and indicates a more vigorous level of effort.

Being able to talk but not sing suggests that the exercise is challenging enough to elevate heart rate and breathing, yet still allows for logistical conversation—a hallmark of moderate activity. This ability to engage in dialogue without excessive strain demonstrates that the intensity is balanced: sufficiently stimulating for health benefits, but not overwhelming.

Conversely, the ability to sing without pausing, the inability to say more than a few words, and the complete inability to talk would all indicate lower or higher levels of activity, respectively, which do not align with the moderate intensity described in the talk test method.