Treadmill, exercise bike, elliptical machine, spinning bike, stair treadmill and some pedals. I am very accurate, hehe.

Treadmills are generally above 3P, while luxury models are around 5P. It is also divided into DC and AC, and the superiority of AC is more obvious.

Exercise bikes and elliptical machines are usually about threesomes, but now many of them are self-generated.

Pedals and paddles are also about threesomes. Paddles have hydraulic resistance and do not need electricity.