True Fitness Treadmill ES9.0 + ES7.0 Owner's Manual page 48

The scientific journal, Occupational Medicine, published a study
in 2004 on the accuracy of the Gerkin test. The conclusion:
"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.
Accuracy of the Gerkin Test
Chapter Five: Gerkin Fitness Test
ES Treadmills Owner's Guide
Accuracy
of the
Gerkin Test
48