National Physical Therapy Examination (NPTE) Practice Exam

What type of activity best describes an energy expenditure of approximately 4 METs?

1. Walking on a level surface at 2 mi/h

2. Walking on a level surface at 3 mi/h

3. Walking on a level surface at 1 mi/h

4. Walking on a level surface at 4 mi/h

The correct answer is: Walking on a level surface at 3 mi/h

An energy expenditure of approximately 4 METs (Metabolic Equivalent of Task) is often associated with moderate-intensity activities. Walking on a level surface at 3 miles per hour typically aligns with this intensity level. At this pace, an individual expends energy in a way that is significantly greater than resting metabolic rates, demonstrating a moderate level of aerobic activity. In the context of the choices, various walking speeds correlate with different MET values. For instance, walking at 2 miles per hour is generally considered light intensity, while walking at 1 mile per hour falls into a very light category. On the other end, walking at 4 miles per hour is classified as brisk walking and results in a higher MET value, likely exceeding 4 METs. Thus, walking at 3 miles per hour is the most accurate representation of an energy expenditure around the 4 METs mark.