Originally Posted by
gregf83
Most HR straps are subject to reading high due to static interference, particularly in dry conditions with a loose jersey. I often get high HR showing up near the beginning of a ride. If I hold my hand over the strap to prevent the jersey from flapping it goes down. Once I start sweating the HR settles down.
Yep! My last HRM was probably fried from static buildup on a really dry Santa Ana day. Read erratic 200+bpm spikes and then refused to indicate anything other than around 135 bpm.