Originally Posted by tntyz

Decided to measure my resting HR with my Garmin 305 last night. Put the strap on and settled into a comfortable chair with a good book. My HR started out at 62, dropped to 53. Then to 51, 50. I've never been under 50, so I was wondering where this would go. Pretty soon I hit 48, 45, 44. When the HR showed 34 I figured something might be wrong.

I think I need a new battery in the transmitter.