A metabolic cart is primarily used to monitor what during exercise testing?

• A. Energy expenditure (calorie burn)
• B. Heart rate
• C. Muscular strength
• D. Flexibility

Answer: (A)

A metabolic cart is used to estimate energy expenditure during exercise by analyzing gas exchange. It measures inspired and expired oxygen and carbon dioxide, tracking VO2 and VCO2, which allows calculation of metabolic rate and substrate use (calorie burn) in real time. This is why it’s tied to how much energy the body is expending at different intensities. It’s not primarily used for heart rate, which comes from heart-rate monitoring, nor for measuring muscular strength or flexibility, which require different assessments.