Bicycleman said:How do you check power output? I'm assuming you have some kind of sensor that connects to your Garmin? I don't have any of that since I'm low tech. I never thought much about power, just what it takes for me to do the distance at a half way decent time.
I use PowerTap hubs. They measure power and transmit the data wirelessly to my Garmin 800. I download the Garmin data to TrainingPeaks and also to GoldenCheetah software for evaluation and as a record.
I train somewhat seriously and power allows me to do a workout as planned but usually it saves me from going to hard when I am not supposed to. Sometimes during intervals you are supposed to go hard and then easy. A power meter is darned helpful on intervals.