Figure 4

Relationship of AT measured as ml.min⁻¹.kg⁻¹to AT ml.min⁻¹.m². The metabolic cart is usually programmed to index ${\mathrm{V}}^{\dot{}}{\mathrm{O}}_2$ as ml.min⁻¹.kg^-1 whereas the pulmonary artery catheter is programmed to index as ml.min^-1.m². Note that ml.min⁻¹.m² indirectly uses height in indexing. Indexing as ml.min⁻¹.kg⁻¹ does not use height. This graph allows direct comparison. Data from author’s laboratory.