Intervals that end when you stop pedaling?

Would it be possible the be able to create intervals that stop when you stop pedaling, similar to the ramp test. For example if I wanted to see how long I could hold x amount of watts, I just set a long interval at that power and go until failure

You could create an interval longer than you intend to go with a recovery immediately after it and then hit the fast forward button once you’re ready to go to recovery.

Dave

that’s how I do it now, I just wonder if there would be a way to automatically do it since the ramp test does it that way