Filter
Top Products
Page 23
state heart rate of the subject to 110 to 150 beats/min for two consecutive
stages. It is important to remember that two consecutive heart rate measure-
ments must be obtained in the 110 to 150 beats/min range to predict VO
2max
.
The test typically lasts from 9 to 15 minutes.
In the StairMaster protocol, each work rate is performed for 3
minutes, with heart rates recorded during the final 4 seconds of the second and
third minutes of each stage. If the heart rates are within 5 beats/min, then the
heart rate during the last minute is plotted against the work rate, and the pro-
gram advances to the next 3-minute stage. The program continues for two to four
stages until two steady state heart rates between 110 to 150 beats/min are ob-
tained in two consecutive stages. The line generated from the plotted points is
then extended to the age-predicted maximal heart rate. A corresponding maximal
work rate and VO
2max
can then be calculated.
At the end of the 3
rd
minute of each stage, if the heart rates at the end
of the 2
nd
and 3
rd
minute are not within 5 beats/min of each other, then that work
rate is maintained for an additional minute. At the end of the 4
th
minute, the
heart rate is compared to the heart rate at the end of the 3
rd
minute. If the heart
rates are within 5 beats/min, then the heart rate during the 4
th
minute is plotted
against the work rate. If the heart rate at the end of the 3
rd
and 4
th
minute are
not within 5 beats/min, then the work rate is maintained for one more additional
minute. If the heart rate at the end of the 4
th
and 5
th
minutes are within 5 beats/
min, then the heart rate at the end of the 5
th
minute is plotted against the work
rate. If the heart rate at the end of the 4
th
and 5
th
minutes are not within 5 beats/
min, then the test failed.
Once two consecutive heart rate measurements are obtained in the 110
to 150 beats/min range, then the test ends successfully and the results are dis-
played. Estimate maximum aerobic capacity is shown in ml/kg/min and METs.
Next, the results are compared to normative values for others of the same age
range and gender (see Table 2). Results are stored in the console until the next
person starts an exercise program. Press [STATS SCAN] to review the results in
addition to being displayed at the end of the test.
7000 PT CONSOLE