Heart Rates - 1st use of a HRM. What's it mean?

[screenman]

We have some power cables near my house that send my Polar to about 220 as I go past them.

 

[Nigelnaturist]

We have some power cables near my house that send my Polar to about 220 as I go past them.

I got a belt once off those things just going over this bridge one wet evening, felt a tingling in my hands and it only lasted while i went under the cables.