This character is a Other Symbol and is commonly used, that is, in no specific script. The character is also known as track and field and gymnasium.
The glyph is not a composition. Its width in East Asian texts is determined by its context. It can be displayed wide or narrow. In bidirectional text it acts as Other Neutral. When changing direction it is not mirrored. U+26F9 prohibits a line break after it, if it’s followed by an emoji modifier.
The CLDR project calls this character “person bouncing ball” for use in screen reading software. It assigns these additional labels, e.g. for search in emoji pickers: ball.
This character is designated as an emoji. It will be rendered as monochrome character on conforming platforms. To enable colorful emoji display, you can combine it with Variation Selector-16: ⛹️ The character can be changed in appearance, if it is followed by an emoji modifier. See the Emojipedia for more details on this character’s emoji properties.
The Wikipedia has the following information about this codepoint:
A gym, short for gymnasium (pl.: gymnasiums or gymnasia), is an indoor venue for exercise and sports. The word is derived from the ancient Greek term "gymnasion". They are commonly found in athletic and fitness centres, and as activity and learning spaces in educational institutions. "Gym" is also the commonly used name for a "fitness centre" or health club, which is often an area for indoor recreation. A "gym" may include or describe adjacent open air areas as well. In Western countries, "gyms" often describe places with indoor or outdoor courts for basketball, hockey, tennis, boxing or wrestling, and with equipment and machines used for physical development training, or to do exercises. In many European countries, Gymnasium (and variations of the word) also can describe a secondary school that prepares students for higher education at a university, with or without the presence of athletic courts, fields, or equipment.