Which plane divides the body into front and back portions?

The frontal plane is the correct choice because it is the anatomical plane that divides the body into anterior (front) and posterior (back) sections. This division allows for the examination of structures or movements that occur in the front-to-back direction. For instance, movements like jumping jacks or side lunges can be analyzed in relation to how they occur within the frontal plane.

The other planes serve different purposes. The sagittal plane divides the body into left and right portions, making it useful for analyzing movements like bending or flexing from side to side. The transverse plane, on the other hand, separates the body into superior (upper) and inferior (lower) parts, which is important for rotational movements, such as twisting. Finally, the oblique plane cuts through the body at an angle, providing a view or analysis that is not confined to the standard anatomical planes. Understanding these distinctions is crucial in sports medicine for assessing and training athletes effectively.