Precor Low-Impact Threadmill M9.57 - Manual (Page 19)

Owner’s Manual: Heart Rate Features 17
Heart Rate Analysis
Every time you complete a program using the chest strap or
touch-sensitive handrail grips, the treadmill provides a heart
rate analysis after the workout summary.
Your average heart rate appears followed by the maximum
heart rate achieved during your workout. A third display
appears, if you entered your age, and indicates the amount of
time your heart rate remained between the target zones
shown.
The heart rate analysis is based on how often your heart rate
signal is received while exercising. If you use the chest strap,
the average heart rate will be more accurate than if you
occasionally grasp the touch-sensitive handrail grips.