By Mark Siebert Do you want to get the most calorie burn out of your workout? Are you finding that you are hitting a plateau? Interval training could be a great option. Interval training is alternating high intensity activity with lower intensity activity. Whether your exercise of choice is walking, running, using cardio equipment or group exercise, intervals can help you get the most from your efforts. After prolonged exercise at the same intensity, your body naturally adapts and becomes more efficient, needing less effort to perform the same activity. Adding intervals can help provide that high intensity exercise in…