Heart Rate Zone; Meaning Of % Grade - CYBEX 750T Owner's Manual

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. 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.
The degree of incline can be related to % grade by taking the Arctangent of the grade. For instance, 15%
grade is equal to 8.53 Degrees (ArcTan(.15)=8.53º). The opposite is true to determine % Grade from
Degree of incline (Tan (8.53º)=.15).
Operation
Page 3-8
Cybex 750T Treadmill Owner's Manual
This chart shows heart rate based on
percentage and age.
Heart Rate Zone
Age 20 30 40 50
220 - Age = Max Heart Rate
Figure 4
Beats
Per
Minute
200
180
160
140
120
100
80
60
60 70