Which action is not an example of sagittal plane movement?

The action of hip adduction is not an example of sagittal plane movement because it primarily occurs in the frontal plane. The sagittal plane divides the body into left and right sections and is associated with movements that include flexion and extension around a coronal axis. Examples of sagittal plane movements are shoulder hyperextension, knee flexion, and plantar flexion, all of which involve moving body parts forward or backward in relation to this imaginary line.

In contrast, hip adduction involves moving the leg toward the midline of the body, which is characteristic of the frontal plane. Therefore, understanding the geometric orientation of movements relative to the body's planes is essential to categorizing them correctly.