What is the term used to describe the range of motion in a joint?

The term that is used to describe the range of motion in a joint is flexibility. Flexibility refers to the ability of a joint or series of joints to move through an unrestricted, pain-free range of motion. This is a crucial aspect of physical fitness as it affects the overall performance in various activities, as well as contributing to the prevention of injuries.

While mobility is also related to movement, it encompasses more than just the range of motion at a single joint. Mobility refers to the ability to move freely and easily, which includes flexibility along with strength and control of movement. Stability pertains to the ability to maintain equilibrium and control body positions, usually in relation to joint support and muscular strength. Agility relates to the ability to change the position of the body quickly and efficiently, combining speed, coordination, and reaction time.

In summary, flexibility specifically addresses the range of motion within joints, making it the most accurate term for this definition.