So you would like to get some work done while jogging on your treadmill? The VIVO Universal Treadmill Desk Riser has you covered. This 29.5 x 11 inch desk riser fits over your handlebars with velcro straps. It is height adjustable from 1.8 inches to 13.9 inches.
This desk riser supports laptops up to 11lbs. It has anti-slip padding to prevent scratches. You can find out more about it here.