When it comes to staying fit indoors, an incline treadmill workout is the way to go. Not only this type of workout is ideal for burning colossal amounts of calories, the incline workouts helps you simulate hill running without struggling to find a good hill to run on or be the victim of outside weather conditions. In addition, the incline helps you build muscle mass (an effective way to strengthen your gluteal muscles and hamstrings), boosts cardiovascular power, prevents boredom, and grants you a great cardiovascular workout without having to increase speed.