During running the Adventurer indicates a heartrate of about 140 bpm. This seems fair since when I measure my pulse during 10 seconds I find 13 beats, which corresponds to ~142 bpm.
However, sometimes the heartrate as indicated by the Adventurer drops. In the next example when I started running up a hill the heartrate value dropped (I would expect an increase due to the increased performance). After resting on top of the hill, apparently the Adventurer appears to 'lock' again, showing a more plausible reate of 150-160.
Even if I take the watch of my wrist, it keeps indicating a heartrate of ~100 bpm!! This does not make sense to me.:?
I would prefer an indication that there is no heartrate value i.s.o. an erronous value. If I remember well (not sure), a previous version of the software did this...