Instructions: Run or walk as quickly as you can for 12 minutes. Fill that number into the calculator below.

Peak oxygen uptake (mL/O2/kg body mass/minute) is the maximum amount of oxygen an individual can use during exercise. It is an integrative measure that combines cardiovascular, skeletal muscle, and pulmonary systems processes to transport and use oxygen, indicating aerobic (cardiorespiratory) fitness. Below, we have provided normative data. A higher number is better.