True Fitness CS4 Owner's Manual page 30

Accuracy of the Gerkin Test
CHAPTER TWO: FITNESS TESTS
The scientific journal, Occupational Medicine, published a study
Accuracy of
in 2004 on the accuracy of the Gerkin test. The conclusion:
the Gerkin
Test
"The Gerkin treadmill protocol overpredicts VO2max in healthy
men and women and, therefore, should not be used for predicting
VO2max in individual firefighters, particularly if VO2max is a
criterion for inclusion or exclusion from duty. At this time, a valid
treadmill running test is needed for predicting the VO2max value
of individual firefighters. "
However, for the fitness enthusiast who is interested in monitoring
their fitness level, the Gerkin test can be used to measure progress
over time.
CS Treadmill Owner's Guide 33