Commercial treadmill catalog by treadmill medic. Treadmill Medic sells numerous brands of commercial grade and gym quality treadmills. Some of the brands include Cybex treadmills, Life Fitness treadmills, Landice treadmills, Spirit treadmills, Intenza treadmills, Woodway treadmills, Precor treadmills, Star Trac treadmills, Inmovement treadmill desks, Lifespan treadmill desks and many many more.