What does the sagittal plane divide?

The sagittal plane is defined as a vertical plane that divides the body into left and right sections. It runs parallel to the midline of the body, allowing for assessment and analysis of movements or positions that emphasize lateral or bilateral balance. This plane is crucial in anatomical and biomechanical discussions, as well as in exercises focused on unilateral movements, which can improve strength and coordination on either side of the body.

In contrast, other planes referenced in the question have specific definitions that do not align with the sagittal plane. For example, the frontal (or coronal) plane divides the body into anterior (front) and posterior (back) sections, while the transverse (or horizontal) plane separates the body into superior (upper) and inferior (lower) parts. Thus, identifying the sagittal plane as the divider of left and right sections is fundamental to understanding body mechanics, movement patterns, and even exercise programming in group fitness settings.