Just finished doing p-90x plyometrics
Have been doing them for a while and let me tell you that it is an absolutely fantastic and beneficial workout. I am a bit partial to the plyometrics and leg workouts on the first phase. I feel those two make a great addition to any running or endurance program.
If you have a chance give those two specific workouts a try and I am certain you will be pleased with the results.
It will be taxing on your body but it will be well worth it
happy training
the bluminator