True Fitness Treadmill ES9.0 + ES7.0 Owner's Manual page 31

Various types of Heart Rate Control (HRC) are available on ES
Series treadmills. This section may describe some types of HRC
that your treadmill does not have.
Time-based constant HRC: pick a target heart rate and exercise
for an amount of time you select.
Interval heart rate training: the treadmill alternates work
intervals at your selected target heart rate with rest intervals that
are at ½ workload. You set the length of both intervals.
• Interval HRC works just like time based constant heart
rate control up through the first work interval.
• When your workout reaches your first rest interval,
your workload is reduced by half, and kept at this rate
throughout the rest interval.
• The next work interval is initially set at an average of the
workloads in the previous work interval.
Distance-based HRC: set a target heart rate and select one of
four distances, just like running a road course: 2 miles, 4 miles, 5
kilometers, or 10 kilometers.
Cruise Control: while in any workout, set your current heart rate
as your target heart rate by pressing a single key.
HRC Types + Workout Guide
Chapter Three: HRC Workouts
ES Treadmills Owner's Guide
Four Basic
Types
of HRC
Workouts
31