What does (un)stationary mean?

The VeloCore bike is a premium indoor cycling bike. Like other indoor bikes, you can ride the VeloCore bike in stationary position. But what makes VeloCore different is that it’s thoughtfully engineered with something called leaning mode. Leaning mode allows you to gently bend and sway from side to side, similar to the way your body moves while riding an outdoor bike. It's a high-intensity escape that'll help to ignite your arms, core, and your thrill for epic outdoor adventure…all from your living room.