The best incline treadmills help exercisers increase their exercise intensity without increasing their speed. Incline treadmills range from a maximum incline of 12% up to an astounding 40% incline. Some also decline to help walkers and runners train for downhill activities. Like other treadmills, incline trainers have training content and impressive tech features. Our best incline treadmills were carefully selected by our experts to complement your training.