Words to Describe treadmills

How treadmills often is described ("________ treadmills")

• motorized
• wooden
• desultory
• most
• many
• parallel
• old
• nonmotorized
• underwater
• speed
• powered
• ordinary
• little
• black
• tiny
• portable
• circular
• driven
• manual
• separate
• side
• adjacent
• economic
• human
• enormous