An index of cardiorespiratory endurance which uses seven parameters, expressed in the following equation: CPI = VC + MBH + MEP + age/SP + DP + PR; where CPI = the cardiopulmonary index; VC = vital capacity in 100-ml units (i.e. 4400 ml is recorded as 44); MBH = maximum breath holding time in seconds; MEP = maximum expiratory pressure; age = age in years to nearest birthday; SP = systolic blood pressure; DP = diastolic blood pressure, PR = resting pulse rate per minute (all pressures are measured in mmHg). CPI scores range from 0.8 in healthy non-athletes to more than 1.8 for Olympic athletes. Those with heart disease may score less than 0.4. The CPI can also be used to indicate the level of fitness by recording the time required to restore all the parameters back to the normal resting level after a standardized exercise.
Subjects: Sports and Exercise Medicine.