Which term describes movement around an axis?

The term that describes movement around an axis is rotation. Rotation refers to the action of an object changing its position by spinning around an internal or external axis. This concept is commonly observed in various body movements, such as when the head turns from side to side or when a limb moves in a circular path.

For instance, when performing a rotational movement, the limb maintains a fixed point while moving in a circle, demonstrating the physical mechanics of rotation. This is crucial in both fitness and biomechanics, as understanding how rotation occurs can aid in the development of strength and stability in various exercises and sports activities.

In contrast, elevation, depression, and protraction refer to specific types of movements that do not inherently involve rotation. Elevation is raising a body part, depression is lowering it, and protraction involves moving a body part forward. Thus, these terms are distinct from the concept of rotation.