National Academy of Sports Medicine (NASM) Group Fitness Instructor Practice Exam 2025 - Free Group Fitness Instructor Practice Questions and Study Guide

The sagittal plane is indeed the correct answer because it divides the body into right and left halves. This plane runs vertically from the front to the back of the body and allows for movements that occur in a forward or backward direction, such as flexion and extension.

To provide additional context, the frontal plane, also known as the coronal plane, divides the body into anterior (front) and posterior (back) sections. It is involved in lateral movements, such as side lunges. The transverse plane, on the other hand, divides the body into superior (upper) and inferior (lower) parts and is involved in rotational movements, like twisting. Understanding these planes is essential for recognizing how different exercises and movements can affect various parts of the body during group fitness classes.