NETA Personal Trainer Practice Exam

What is the primary function of the transverse abdominis?

1. Stabilize the pelvis and lumbar spine

2. Perform spinal extension

3. Facilitate shoulder adduction

4. Support hip flexion

The correct answer is: Stabilize the pelvis and lumbar spine

The primary function of the transverse abdominis is to stabilize the pelvis and lumbar spine. This deep abdominal muscle acts like a corset around the waist, providing critical support to the abdomen and lower back. By contracting, the transverse abdominis increases intra-abdominal pressure, which helps maintain proper posture and alignment during various activities, especially those that require core stability. This muscle plays a vital role in protecting the spine and enhancing overall stability, which is essential for performing exercises correctly and minimizing the risk of injury. In contrast, the other choices address functions that are not associated with the transverse abdominis. Spinal extension is more closely linked with the erector spinae and other back muscles. Shoulder adduction involves muscles around the shoulder joint, such as the pectoralis major and latissimus dorsi, rather than the abdominal muscles. Lastly, hip flexion primarily engages the iliopsoas and rectus femoris muscles rather than the transverse abdominis. Thus, the primary role of the transverse abdominis is indeed to stabilize the pelvis and lumbar spine during movement and load.