So, my FR235 has long set my VO2 Max for running. This will occasionally change plus or minus one. What has to be done for my watch to set my VO2 Max for cycling? I bike outside or use my indoor trainer more than I run, so frequencies isn't the issue. I'm using the same Garmin HR strap I use for running. I have numerous rides where I've maintained speed over relatively flat smooth roads for over 30 minutes. The manual only covers VO2 Max for running and I can't find anything on the forums. Am I missing something, or is this another feature to add to my list of "should work, but doesn't"?