Just as a heads up-
i recorded a single road ride off a stages meter simultaneously on a Garmin 500 (Ant+)and via the Strava app on my iPhone (Bluetooth)
the file recorded by the phone had crazy transmission gaps- basically useless.
also-
Play around with the PMC chart on the Home tab of Golden Cheetah. Interesting fitness/fatigue tracking. It will take a while uploading files before the readings are complete- but you may be able to isolate when you will have a good day before it happens..
Me I just train hard no matter how I feel
