what are some hiit cardio workouts?
['Warm-Up. [00:18]', 'Arm Cross Swing. [00:34]', 'Jumping Jacks. [03:04]', 'High Knees. [04:33]', 'Walk Downs. [05:39]', 'Burpees. [06:45]', 'Star Jumps. [08:39]', 'Jumping Lunge. [11:15]']