The most useful sentence anyone can tell you about the Teeter FreeStep is what it is not: it is not a bike. On every other seated machine we cover — the recumbent bikes and the recumbent cross-trainers alike — your feet travel around a circle or an ellipse. On the FreeStep, published as a linear stepping motion, the pedals push straight out and draw straight back along a line. That is the single most different joint path on this site, and it is the whole reason the machine exists.
Here is why the shape matters. A circular pedal stroke carries the knee through the same flexion arc on every revolution, including the deep part of the bend at the top of the circle — which is the part some arthritic knees object to. A straight-line step lets you decide how far the knee bends and then never forces it past that point. Movement itself is the goal the authorities keep pointing at: the Arthritis Foundation lists low-impact options such as cycling for arthritic joints, and it is clear that motion helps osteoarthritis rather than aggravating it. Which specific motion suits your knee, though, is a question for your doctor or physical therapist, not a spec sheet.
The second headline is the price. This is the most expensive machine on the entire site, by a wide margin. So the real question is not whether a straight-line stride is different — it plainly is — but whether that difference, plus the published electronic step lock and the 350 lb capacity, is worth several times what a basic recumbent bike costs.
And we will not bury the gaps. Teeter still does not publish a step-over height, a seat height, or a box weight for this machine. The physical-therapy licensing you will see mentioned is about the stride patent— not evidence that the FreeStep will treat your particular condition. We come back to both below.