Cybex 425T Treadmill Owner’s Manual
Operation
Page 3-8
Heart Rate Zone
Heart Rate is described by the number of times your heart beats in a minute. At rest, the average adult
will have a heart rate of about 72 beats per minute (bpm). As one begins to exercise, heart rate increases
and continues to increase as exercise intensity or diffi culty increases.
Monitoring your heart rate is an effective way to control the intensity of your workout and subsequently
the results it will have. Whether you are a new participant or one with a great deal of experience, weight
loss and other performance goals can be achieved by controlling the intensity of your workout.
The American College of Sports Medicine recommends that healthy adults exercise between 55 and
85% of their heart rate max. Your heart rate max can be estimated by subtracting your age from 220.
Multiply that estimated heart rate max by .55 to estimate the lower end of your heart rate training zone.
Then multiply your estimated heart rate max
by .85 to estimate the higher end of your
training zone. This heart rate training zone
gives you a range of intensities at which to
exercise.
NOTE: A label is located on the console to
remind you what the heart rate zone
is while you are working out.
See Figure 4.
Meaning of % Grade
A 1% grade is not the same as a 1 degree
incline. The % grade is the relationship of the
measurement of rise over the measurement
of run (also called slope). For example, a 1
foot (meter) rise in height over a length of 100
feet (meters) is a 1% grade. Expressed as a
mathematical formula, the grade is calculated
as follows:
1 ft. (m) / 100 ft. (m) = 0.01 = 1%
With respect to treadmills, the percent grade
is roughly equal to the increase in height
(rise) of the treadmill divided by the length
(run) of the treadmill.
DE-18556-4
220 - Age = Max Heart Rate
Heart Rate Zone
200
180
160
140
120
60
Age
80
100
Beats
Per
Minute
20 30 40 50 60 70
Max
85%
65%
Max
85%
65%
This decal shows heart rate based on
percentage and age.
Figure 4
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