I like this. Seems easy but wait til you get to 5...
Killer Lower Body Countdown Workout || lushiousLIFTS.com
Killer Countdown: quick routine that incorporates exercise you already know how to do in a high intensity format that allows you to get your heart pumping!
Countdown Cardio Workout- looks easy, but burns those calories!
Burpee Countdown Workout - via @Kaila@HealthyHelper
Tough Mudder Workout 1...this looks seriously intense! Great if you're training for a Tough Mudder event! #workout #fitness
Here's a fun countdown workout that will help you grow in strength, but also keep up in your cardio training. You will do this workout Tuesday, Thursday, and Saturday of your first two weeks.
Unapologetically You: Workout Wednesday - 100 Rep Countdown
Image detail for -... plyometric exercises to create my own plyometric countdown workout
Jumping Jack Countdown Total Body Workout