The size of plastic wrap should be suitable for your physical reality. If it is too big, it will have no effect. If it is too small, it will make you feel uncomfortable.
To persevere, you can't fish for three days and dry the net for two days.
As for the hula hoop that others say, it is a method of hunger and tension. By the time your exercise is almost effective, you have already paid a lot of energy, and people's energy is limited, so the result of this practice is to make you old. People are getting old. Do you think losing weight is still interesting? So I suggest you don't listen!