True Fitness Z8, Z9 manual Z 8 a n d Z 9 S e r i e s Tr e a d m i l l O w n e r s G u i d e

Appendix A - Target Heart Rate Chart

Because CHR is already trying to detect a fainter signal compared to a chest strap, it takes less of a vertical heart position to cause it to stop working. Depending on the CHR system, somewhere between 3% and 5% of the population cannot be picked up by any contact heart rate monitoring system.

This heart-in-the-chest-cavity position is by far the leading cause of CHR performance variation among individuals. Other factors which negatively affect CHR performance are:

1.Dry or dirty hands.

2.Lotion or moisturizer on hands.

3.Excessive upper body motion, such as when using cross-trainer ellipticals and in running.

4.Excessively tight grip.

5.Erratic or labored breathing or excessive talking.

Causes

of CHR

Performance Variation

80

Z 8 a n d Z 9 S e r i e s Tr e a d m i l l O w n e r ' s G u i d e