Gyms are generally equipped with a physical fitness tester, which can be connected to the display screen, then display various physical fitness indicators, and can also print physical fitness test documents.

This kind of body tester does not need to be equipped with a camera, and its official name is body composition meter.

Gyms are usually equipped with a large mirror in the equipment area for everyone to correct their movements. Some fitness clubs have installed one-way mirrors in private classrooms, which can see the outside, but not the inside.

The gym is equipped with cameras. Because it is a public place, there will be training accidents, so it is generally installed.

Body tester, mirror and camera, these are three things.