Plyometrics for cycling would primarily be jumping exercises and bounding. Side jumps, one and two legged. Box jumps, two legged forward, single leg side. Broad jumps. Stair bounding. They are a high impact exercise so they won't help if you have bad ankles, knees or hips. They can however, increase bone density and will increase cycling power. My trainer has me do them for 8 weeks in the winter only.

Don't get me wrong on Cycleops. They are very good. I just find the KK to be better designed and machined and smoother to ride.