The beauty of HIIT is that everyone can do it at their own level, whatever it might be. As long as we give it our all we will see results. HIIT it with the New Beginnings Workout and get back into it, like you mean it. Keep the plank when transitioning from the plank to climbers, plank jacks and plank leg raises, DDD = don't drop down. Go flat out when performing high knees, jumping jacks and butt kicks.
Extra Credit: 1 minute rest between sets.