You may be asking yourself, what's a Garmin Edge 500...Well The "Edge" is a Cycling GPS unit that allows the user (Me) to track, store, and analyze important data such as speed/pace, cadence/rpm's, heart rate bpm, and a host of other data.
My first ride I was surprised at my consistency. My cadence was an average 91 RPM's which the pro's say 90 is optimal. My heart rate hbm averaged at 167 or so which is about 90% of my max bpm. Click on the details link below to see the data if you are interested.