National Academy of Sports Medicine (NASM) Group Fitness Instructor Practice Exam

In a pre-natal exercise class design, which positions should be eliminated for women who are past their first trimester?

1. Prone and supine

2. Seated and standing

3. Supine and lateral

4. Prone and seated

The correct answer is: Prone and supine

In a pre-natal exercise class design, it is important to prioritize the safety and comfort of pregnant women, particularly for those who are beyond their first trimester. As pregnancy progresses, certain positions become less favorable due to physiological changes, especially regarding blood circulation and pressure on the abdominal area. Prone (lying on the stomach) positions are generally avoided after the first trimester because the growing belly can make this position uncomfortable and potentially unsafe. Supine (lying on the back) positions are also discouraged after the first trimester since lying flat on the back can compress the inferior vena cava—a large vein that carries blood from the lower body to the heart—leading to reduced blood flow and dizziness or discomfort for the mother. By eliminating prone and supine positions, the exercise program can ensure that participants are engaging in movements that promote safety and comfort while providing adequate blood flow to both the mother and the developing fetus. In contrast, seated and standing positions, as well as lateral positions, can provide stability and allow for appropriate movement without the risks associated with lying flat on the back or stomach.