does the incline on a treadmill increase in %?
Treadmill workouts vary greatly among users. Most power incline treadmills will go from 0 to 10% and some raise as much as 12% and even 15%. The newest NordicTrack Incline Trainers go up to a whopping 40% incline. Some manual treadmills even come with a permanent, slight incline that is non-adjustable. For most people, a slightly inclined treadmill deck seems to have little or no measurable effect on their workout. Yet many find the 0% or flat level of the belt does not give them a feeling of being a challenge at all.