Hi Laura,
Plyometrics (aka Plyo X) uses very athletic cardio movements. The workout itself is broken down into "Rounds" like Shoulders & Arms is. For example:
A Round might consist of:
Squat Jumps for 30 seconds
Mary Catherine's for 30 seconds (similar to Cathe power lunge)
Truck Tires for 30 seconds
One legged hops for 1 minute
-Repeat all of the above
I think there are 5 or 6 rounds and then a "bonus" round of moves that you do for 1 minute.
You don't really do the moves to the beat of the music, Tony will often set a pace, so it's possible to modify your pace to increase or decrease the intensity. It also offers some lower impact options.
Even though some of the moves are the same as those that Cathe uses, tuck jumps for instance, I find that being able to more easily modify the pace makes them less jarring on my knees.
This workout is definitely a keeper!
