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9 - Heartrate Control
The Heartrate Control (HRC) workout will attempt to bring the user to their target heartrate in 3-5 minutes,
then keep them there for the duration of the body of the program. A Cool Down is built in to the end of
the program. HRC is run in Constant Power and thus defines watts.
Note: This workout requires the user to wear a 5 KHz Polar
®
or compatible heart rate transmitter
belt. The Heart Rate Control workout (HRC) cannot be selected on the control console unless it
detects a heart rate signal. The HRC workout will not work with the cardio touch contact heart
rate system.
The user selects a target heartrate, which defaults to 75% of max. Limits should be set to not allow a
Target HR (THR) less than 60% of max or more than 95% of max.
Max HR formula: 208-(0.7 x Age).
The protocol starts in Stage II, with the entry point based on Target HR.
• 80 – 120 BPM = Step 6
• 121-127 BPM = Step 8
• 128-134 BPM = Step 10
• 135-up BPM = Step 12
A running pulse-to-pulse BPM value is continuously measured.
Every 15 seconds the user’s pulse rate is sampled and a prediction function is evaluated (decision.)
This is subtracted from the target heartrate to form an error value which is scaled and added to the
current load value. There is a maximum rate of change of 15 steps per decision.
A chart of Step and Watts has been created. It has four defined stages:
• Stage 1 ramps the load from Step 1 to Step 5.
• Stage 2 ramps the load from Step 6 through Step 18.
• Stage 3 ramps the load from Step 19 through Step 39.
• Stage 4 ramps the load from Step 40 through Step 100.
The user has full control over incline throughout the program, with incline having no bearing on the
program at all. The user has limited control over the load in that the user’s selections are not permanent.
At the next decision, a new load can be chosen by the software as described above to override any
user modifications.
If the user presses the LEVEL key, they can modify their Target Heartrate real-time. Utilize the Target
Heartrate Setup selection screen and exit back to the program in progress, making the change to their
target heartrate real-time.
Page 78 of 80
Cybex 625C/625R Cycle Part Number LT-23688-4 F
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