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From Fellrnr.com, Running tips
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[[File:GC realtime.png|center|thumb|300px| The real time display, with the workout being filled in with actual data from the ride. ]]
Golden Cheetah stores the workouts in ERG files, which encodes the interval duration as fractional minutes to two decimal places. This means that durations of 20 seconds get converted to "0.33" which will get turned back to 19 seconds, which is rather frustrating. To avoid this, you'll need to use durations that are divisible by three seconds, so instead of 20 seconds, you'll need to set 18 or 21 seconds.
If you see spikes in the power curve when using Golden Cheetah with a Kickr, it may be because you have the Kickr connected as multiple devices. You should connect the Kickr as just FE-C (Fitness Equipment Control) and leave both the speed and power sources as blank.
==Wahoo App==
I really expected the Wahoo app to provide all the basic functionality you'd need. Sadly, this is not the case. You can do some manual control of resistance, but there's no way of using it to run a predefined HIIT session. You do need to use the Wahoo app to calibrate the trainer (see above), plus there are a couple of options you can set only thought the app. You can configure the trainer to simulate a speed that is proportional to the power you're applying in ERG mode. By default, it will just report the actual speed of the wheel, and in ERG mode you can be moving very slowly with huge resistance. This setting is overridden by Zwift, which uses its own speed calculation based on power and the virtual slope you're virtually riding on.
