Originally Posted by terrymorse
Polar reading outrageously high heart rate happens way too often. The two major culprits are electrical interference and flapping jersey. You can't do much about the interference, but getting a tighter fitting jersey helps a lot. I took in my jersies across the chest, and now I have much less problem with the crazy high heart rate readings.
The flapping jersey is the problem. Especially when you get in the drops down hill.