You can do a lot in 12 mins and this workout is short but a good session for your heart, lungs and legs. You need some energy for this one, as it is short but intense - those thighs will burn.
There are 4 exercises in this workout and you do each for 1 minute before resting for 30 seconds and repeating! 3 rounds in total. The exercises are:
1. Forward / backward step (with jump)
3. Squat, lunge, squat.
4. Squat with butt kicks
Here is a follow along video: