Of you want to get a good sweat but you hare going to the gym, roller skating will give you what you need. You have to move fast and skate hard in order for it to work. The reason that skating works so well as a cardio activity is because it’s possible to go almost nonstop. The fun of the roller skating has a tendency to blind you to the pain of the work. Another reason that skating is so great for cardio is that we exercise for up to 4 hours. Who wants to stay in the gym for four hours. Working out at a high intensity for hours at a time will surely allow you to burn hundreds of calories.