We call this one "Twelve Minutes of Hustle." Workouts don't have to take an hour to be effective. It's all about your effort. So go all in on this quick one.
Start with 2 minutes of Burpees, counting reps
then, without resting,
1 min each of:
Step Back Lunges
Repeat 2 times (3 times for advanced)
then, without resting
Finish with the same number of burpess you did in the first 2 minutes.