The idea of owning a treadmill still conjures up images of a spare room or garage dedicated to fitness equipment. In practice, most people who buy a compact walking treadmill don't have that kind of space — and increasingly, they don't need it.
The shift comes down to two design choices: folding and mobility. A treadmill that folds flat can be tucked behind a sofa, slid under a bed, or stood upright in a corner when it's not in use, rather than permanently occupying floor space. Add wheels or a towing handle, and moving it between rooms becomes closer to wheeling a suitcase than lifting furniture.
That combination changes how the equipment actually gets used day to day. Instead of a machine you walk to, it becomes a machine you bring to wherever you're already spending time — the living room during a film, the kitchen while something's in the oven, or a hallway spot that would otherwise sit empty.
If you're weighing up whether a treadmill could work in a smaller home, the practical questions are usually: where will it live when it's folded away, how far does it need to travel between that spot and where you'll use it, and whether that path is clear enough to wheel it there without rearranging furniture every time.
Answer those three, and space stops being the limiting factor it first appears to be.