HIIT: Lower body focus

This routine is aimed at working the legs and core. This is an ideal workout should you have any upper body injuries or if you just fancy something different.
20 minutes of HIIT
Perform these ten exercises for 2-3 rounds, perform each exercise for 40 seconds, then rest for 20 seconds between each exercise-

Jumping Jacks
Crunches
Bodyweight Squats
Flutter Kicks
Plyo-Squats
Supine scissors
Side Lunges
Shoulder-tap planks
Side-lying Crunch
Low-Impact Burpees