1, generally speaking, the body fat rate test used in commercial gyms is the resistance method. The basic principle of resistance method is that because of the different conductivity of fat and muscle, people's body fat percentage is related to their resistivity in a certain range by default, so we can estimate their body fat percentage by testing their resistivity. However, due to many factors, the measurement data is not very accurate.

2. Gym refers to the place for fitness, rehabilitation and exercise activities. Generally speaking, there are complete facilities, comprehensive fitness and entertainment programs, professional coaches to guide and a good fitness atmosphere. In the gym, you can not only exercise your muscles, make your figure more tangible, but also make many new friends.

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