This workout was programmed to challenge your endurance while helping you burn a significant number of calories in only 20 minutes! The workout will take you from a 0 incline warm up, to a level 15 hill run. The goal of the workout is to remain jogging or running for the whole 15-minute ascent. A speed range between 4 mph and 7 mph is a good place to start if you are not sure how your body will respond to the incline running. If you feel the need to reduce your speed, simply complete the workout at a speed you are comfortable with. After you have completed the workout a few times, you could see your running strength and endurance increase. Use the video to help you complete the workout.