The incline feature on a treadmill is planned to imitate uphill climbing. Most individuals who are climbing uphill do not travel quickly, but maintain a nice, slow, steady pace. Follow this procedure while working out on your treadmill, and you should be better able to maintain the incline level for longer periods of time. If you are just beginning an exercise program, begin at a low incline level and speed.
Do only as much as you can comfortably do. To get the best results follow the treadmill incline feature, allow your hands to swing freely during workouts, as you would if you were actually going up a hill or mountain. As your endurance and strength improve, gradually increase the intensity and length of your workouts.