CYBEX 770R Owner's Manual download pdf (Page 76)

Cybex Owner’s Manual

Cardio - Heartrate Control

This workout requires a Polar® compatible heart rate transmitter belt (not included).

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 workout. A Cool Down is built in to

the end of the workout. HRC is run in Constant Power and thus denes watts.

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 94% 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.

The workload equates to the speed of the workout. A chart of Step and Watts has been created. It has

four dened 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 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

modications.

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 workout in progress, making the change to their

target heartrate real-time.

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CYBEX 770R Owner's Manual Page 76