I have walked 4 hours on it and have yet to bang my hands on the hand rails as others have complained about.

The worst thing about this treadmill is that those hand rails are hard and scratchy on the end and angled downward at the ends)--and because of the narrowness of the belt, I am constantly bumping (hard) into them with my hands/wrists as my arms swing forward/upward, which creates scratches, bruises, and mid-workout cursing.

Unfortunately, if you grab the hand rails, it's easy to bump the integrated start/stop buttons and it stops the treadmill