Here's from the Keiser manual:
From seated riding, while maintaining a low-moderate resistance, the participant increases their cadence a small
percentage at a time. Example: Set a tempo and gradually increase leg speed 10% and hold the new cadence,
again increase 10% and hold the new cadence . . . Another Cue would be to increase 5-10 RPM’s at regular
intervals (every minute). Emphasis is on technique and skill acquisition. Good for beginners, work up to 5 minutes.
You may also ride decreases as a cool down or recovery.
I've attached the whole manual for reference. There seems to be some good drills in there.