Stairmaster 10G Owner's Manual page 12

WFI Test Program
The WFI test assesses aerobic capacity
expressed as VO2max. The results are
calculated and recorded in milliliters (ml) of
oxygen per kilogram (kg) of body weight per
minute (V02 max).
These aerobic assessments are submaximal
and are based on the heart rate response
during graded exercise. Accurate estimation
of maximal heart rate (MHR) is critical to
the submaximal prediction used in these
assessments. A new formula for calculating
maximal heart rate is utilized with these
protocols, it more accurately accounts for
age-related reduction of MHR. Be aware that
the heart rate can be affected by variables such as body temperature, hydration state, anxiety, stress and
medications. In addition to heart rate, body mass (height-to-weight ratio), is also a significant variable in both
prediction equations. The relationship between height and weight is recorded as Body Mass Index (BMI). It
is important to note that BMI is not being used in these aerobic protocols to estimate body composition; but
rather, is used to represent the mass of each participant.
Test Protocol
The test starts at 46 steps/min for 2 minutes, then 53 steps/min for 1 minute (warm-up period). The test time
includes the warm-up time. The test is a series of 1-minute intervals with increasing work loads on each
subsequent minute.
Note: Once the test starts, the user should not maintain a hold or lean on the handrails; this will result in
overestimation of aerobic capacity.
The test is complete when the heart rate exceeds the Target Heart Rate (THR) for 15 seconds. The total Test
Time (TT) begins from the time the user starts on the StepMill, to the point at which the user exceeds their THR.
It does not include the final 15 second qualification period that the heart rate was above the THR.
The qualification period is to verify the user's heart rate does not exceed the target, and then drop down to the
THR or below for 15 seconds, if it does, then the test continues.
Once the test is completed, the user should cool down for a minimum of 2 minutes at 39 steps/min.
The test is aborted with no results if any of the following occurs:
• The user stops or pauses the workout at any point during the test.
• The key is pressed.
• The THR has not been met after 16 minutes previous
work level.
• The Heart Rate signal is lost.
• The equipment malfunctions.
Target HR = [208 - (0.7* Age)] * 0.85
BMI
(in - Ibs) = 703* Weight (Ibs) / [Height (in)]
BMI
(cm - kg) = Weight (Kg) / [Height (m)]
VO2max = 57.774 + (1.757 x time) - (0.904 x BMI)
Fig. 6
2
2
General Formulas
Page 11