36
H
EART
R
ATE
R
EADING
I
S
E
RRATIC
O
R
E
XTREMELY
H
IGH
If the chest strap is worn near sources of electromagnetic signals, these signals may be strong enough to elevate
heart rate readings. Possible sources include:
•
Television sets and/or antennas, cell phones, computers, cars, high voltage power lines and motor driven
exercise equipment.
•
Another heart rate transmitter within three feet, or one meter, may also cause abnormal heart rate readings.