To improve posture during pregnancy, it is most effective to strengthen which of the following muscle groups?

Strengthening the abdominals and lower back is essential for improving posture during pregnancy because these muscle groups play a significant role in supporting the spine and maintaining proper alignment. As the body undergoes changes, particularly with the growing belly, there is an increased demand on the core muscles to stabilize the pelvis and lower back. A strong core helps counteract the forward pull of the abdominal weight and can reduce the strain on the back, which is crucial for maintaining good posture throughout pregnancy.

Additionally, a solid foundation of core strength can aid in reducing discomfort, enhancing balance, and preparing the body for labor and delivery. Strengthening the lower back complements this by ensuring that the muscles responsible for supporting the spine are robust enough to handle the changes in weight distribution and maintain stability.

Other muscle groups, while important for overall fitness, do not specifically address the unique postural challenges faced during pregnancy as effectively as the abdominals and lower back do.