CanFitPro Personal Training Specialist Test 2025 – 400 Free Practice Questions to Pass the Exam

The terms 'medial' and 'lateral' are used to describe the relative positions of body structures. Medial refers to being closer to the midline of the body, while lateral refers to being farther away from the midline. This correlates to the sagittal plane, which divides the body into left and right sides. The other options, the frontal (coronal) and transverse planes, do not relate to these terms. The frontal plane divides the body into front and back halves, while the transverse plane divides the body into top and bottom halves. Therefore, A is the correct answer.