The HRMs are precision instruments with a level of accuracy comparable to that of electrocardiograms in measuring the rate of heartbeat, and they are used for the specialized technical purpose of monitoring the heart rate during exercise.
(The HRMs; are; precision instruments with a level of accuracy comparable to that of electrocardiograms in measuring the rate of heartbeat) (they; are used; for the specialized technical purpose of monitoring the heart rate during exercise)
The HRMs they
are are used
precision instruments with a level of accuracy comparable to that of electrocardiograms in measuring the rate of heartbeat
for the specialized technical purpose of monitoring the heart rate during exercise