The number is large, the proportion is pitiful, and the persistence is pitiful! Gym refers to a 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.

Roughly classified:

(1) Systematic: it belongs to comprehensive training equipment; It can be used by many people to cycle or selectively practice on a musical instrument at the same time. This kind of fitness equipment is bulky, multifunctional and expensive, and is suitable for fitness centers, rehabilitation centers, institutions or school gyms. It should be noted that, for example, the multi-function treadmill is a kind of whole-body fitness equipment, but it only adds the functions of rowing, pedaling, push-ups, waist turning, massage and so on to the single-function treadmill, so it is not very large and suitable for home gyms.

(2) Locality: Most of them belong to special training equipment, with a small structure, covering an area of about 1 m2, most of which can be folded and some of which are interesting. Its function is relatively simple, mainly focusing on the exercise of local muscle groups. This kind of instrument has both power type with counterweight and hydraulic cylinder as heavy load and non-power type with its own power, and it does not need to be disassembled. Some are also equipped with electronic display devices such as time, speed, distance and heart rate, so that exercisers can master the amount of exercise themselves. Therefore, it is favored by fitness enthusiasts and is the "protagonist" of the family gym.

(3) Small equipment: Although small in size, it has high exercisable value. Take the adjustable dumbbell as an example. It is not only suitable for people of different ages, genders and physiques to practice, but also can exercise muscles in all parts of the body. It is a necessary instrument for bodybuilders. Another example is the spring tensioner, which is light and compact, low in price and easy to store and carry; It can also achieve the purpose of fitness. Small fitness equipment such as fitness balls is most suitable for middle-aged and elderly people.