Cycling specific heart rate monitor

[TrekTheKaty]

I use a Garmin Forerunner 305. I chose it because I can also use it for hiking and skiing (you wear it on your wrist--I loop it on my handlebar). It has a heart rate monitor and optional cadence counter. I mostly use the heart rate monitor to track that I'm riding farther, faster and hillier (?!) routes with a lower heart rate. I've also confirmed my approximate max HR is 182--that's about where I was at the top of my "heartbreak" hill and wanted OFF my bike!

[OakLeaf]

I have a Garmin Edge 705 and an old Forerunner 301. The Forerunner series have a software package that calculates your HR zones for running only, based on changes in your HR at different speeds over several workouts that include anaerobic intervals. I've never done a true LT calculation but the Forerunner's calculations seem to match my perceived exertion pretty well. Because there are so many variables that affect cycling speed, the software only works on your running profile.

Now, I know that max cycling HR is normally 5-10 bpm lower than max running HR, but I don't know whether the zones translate from running to cycling as well. Anyway I love my gadgets, but I'm a total data geek.