Cardio workouts with lots of calisthenics are a great way to tone your body and burn body fat. The 12 Minute Cardio Workout packs a lot of exercises into a small amount of time. This makes sure that you workout fast. Cardio workouts are most effective when you workout briskly, with little to no rest between intervals.
Aim for doing 24 rounds of 25 second exercises. There is 5 seconds of rest between intervals. But, this is really just enough time to get into the next exercise. If you are a beginner, you can add more than 5 seconds of rest. Try to minimize the amount of rest between sets to keep your heart rate up. Use this cardio workout as a warm up, or your entire workout.