Which of the following activities is NOT considered moderate-intensity?

The activity that is considered NOT moderate-intensity is the option that involves running 3 miles in 30 minutes. This activity equates to a pace of 10 minutes per mile, which typically places it in the vigorous-intensity category rather than moderate. Moderate-intensity activities are generally characterized by an increase in heart rate and breathing but still allow for conversation. In contrast, running is typically more strenuous and can elevate heart rates significantly, making it harder to maintain a conversation, which aligns more closely with vigorous intensity.

In contrast, the other activities listed are examples of moderate-intensity exercises. Stair walking, lap swimming, and brisk walking tend to fall within the moderate-intensity range, allowing individuals to engage without excessive strain while still gaining cardiovascular benefits. These definitions are supported by guidelines from health organizations that categorize exercise intensity based on perceived effort, heart rate, and ability to communicate during the activity. Understanding these distinctions is crucial for classifying exercises effectively according to their intensity levels.