A physiologic cost index (PCI) offers the advantage of capturing increases in ambulatory and metabolic efficiency that occur when the distance traveled during 6 minutes may not increase, but a lower heart rate is elicited during the task.
A physiologic costindex (PCI) offers the advantage ofcapturing increases in ambulatoryand metabolic efficiency that occurwhen the distance traveled during 6minutes may not increase, but alower heart rate is elicited during thetask.