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Treadmill Incline - Adding Variety to Your Workouts You can adjust the incline on your treadmill to vary the intensity of your workout. An incline mimics the effects of climbing a hill and will help you burn more calories. When you increase the incline, your heart rate increases and various muscles are strained. This can help prevent plateauing in your fitness. It strengthens the heart The treadmill incline will increase the intensity of your workout and will help you to burn more calories.