Small footprint and cheap equipment:
The floor space is really small, basically you can stand where you can train. At home, in the office, outside, you can exercise anytime, anywhere.
It can adjust the training intensity for different levels of athletes. In the field of rehabilitation physiotherapy, it can also gradually increase as the patient's recovery improves and the strength increases. Thereby providing positive feedback to the user.
The force always confronts:
In the conventional "lifting iron" training, usually the trainer will unconsciously exert force and use a short inertia to help complete a set of training (but such "lazy" often cannot achieve sufficient training intensity stimulation).