Day 11 of the 12 Days of Christmas. Try this awesome fat-burning cardio that combines HIIT with a focus on the abs.

Lots of variety, so we hit all the ab muscles, with options shown if you can't do a plank or any high-impact moves.

So, if you're a beginner, or if you have a hard time getting your hands to the ground have a chair nearby for one of our moves. Other than that no equipment is needed for this bodyweight ab HIIT workout.