Originally Posted by
chadwick
That's usually a sign of sensor issues rather than your real HR. Most of them don't work well unless they are quite well drenched, and depending upon the technology used it can be worse with some clothing and external RF interference.
It goes away in 10 minutes because of your own sweat.
Are you wetting it well before you put it on?
Well, I'll be darned!
I get the same bizarre readings early in my ride.
I thought it was something along my route.