For some people, working out means working out hard. They want sweat falling from their eyebrows, sore muscles, and that feeling like you couldn’t possibly have worked any harder. For these people, a slow and methodical workout simply won’t cut it. They want fast, intense, and heart pounding. If you fall into this group, it’s likely that you’re always looking for something new and challenging. If you need some ideas for fast-paced workouts, take a look at these great options.SprintingIf you enjoy running, why not take it up a notch and do some sprinting? Sprinting requires quick bursts of powerful energy. We use the large muscle groups in the legs, demand the lungs to take in more air, and require the heart to pump more oxygen throughout the body. It’s an incredibly effective way to sculpt muscles and burn fat. Sprint on a flat plane for beginners, and take it to an incline for anyone wanting an extra challenge.SpinningSpinning is a cycling class that is done indoors at an incredibly fast pace. Some instructors even incorporate some slight dance moves to engage the upper body. So why is this a great workout? One spin class can burn over 800 calories. It definitely makes you sweat and requires every muscle in the body to be engaged. Check out a local gym to find a class, and be sure to leave plenty of time for recovery afterward, as you’re likely to be sore and exhausted after just one class.KickboxingThis is a great class for anyone who loves striking and kicking. Kickboxing is usually done in class format, and requires quick cardio and powerful moves of the arms and legs. It can help you sculpt the muscles, and it definitely helps burn fat from the body. This can be found at most gyms and some martial arts studios. Give it a try to see if it’s the right fit for you, and if it is, you may have found an exercise that builds a strong body, lowers stress, and is a ton of fun all at the same time.Fast-paced workouts definitely work. They’re tough and intense, and they make a lot of people feel strong and capable. If you like this kind of workout, give these options a try. You may find some new exercises to throw into the routine to keep you feeling challenged and to keep your body changing for the better.