Polar 72X HRMs

Chris M wrote:
FWIW I have used the 7X series since its release and find the totaly
fluctuation over the course a a single day's ride to be normally about
5 to 10 feet and only once or twice over 20 feet.

Maybe mine is a little different, but I am often quite surprised that
my hour-long trainer workouts result in somehow gaining 15-30 feet of
elevation!

Andrew F Martin Wrote:
Chris M wrote:
FWIW I have used the 7X series since its release and find the totaly
fluctuation over the course a a single day's ride to be normally
about
5 to 10 feet and only once or twice over 20 feet.

Maybe mine is a little different, but I am often quite surprised that
my hour-long trainer workouts result in somehow gaining 15-30 feet of
elevation!
If you have it mounted on your wrist it will effect the barometer
readings giving you a higher temp reading resulting in a lower pressure
reading and therefore a rise in altitude.


--
jcjordan

Yeah - I buy that. I usually mount it to the bars though. Probably
more likely an issue is that I live in the Puget Sound Convergence zone
- my ears pop 3-4 times a day as different weather systems move around.