ACSM Personal Trainer Certification Practice Exam

Which plane of the body divides it into left and right segments?

1. Sagittal Plane

2. Frontal Plane

3. Horizontal Plane

4. Transverse Plane

The correct answer is: Sagittal Plane

The sagittal plane is the correct choice because it is the anatomical plane that divides the body into left and right segments. This division occurs vertically, and movements that occur in this plane often involve flexion and extension, such as tasks like bicep curls or squats. The sagittal plane is instrumental in understanding many exercises and assessing body movement, as it directly relates to how the body moves in relation to its left and right sides. In contrast, the frontal plane divides the body into anterior (front) and posterior (back) sections, which is essential for understanding side-to-side movements like lateral raises or jumping jacks. The horizontal plane, also known as the transverse plane, separates the body into upper and lower parts, which is crucial for rotational movements such as twisting. Therefore, distinguishing the sagittal plane's role is vital in anatomy and exercise science, as it specifically focuses on dividing the body into left and right segments.