NETA Personal Trainer Practice Exam

Which of the following muscles primarily stabilize the spine?

1. Latissimus Dorsi

2. Transverse Abdominis

3. Gluteus Maximus

4. Rectus Abdominis

The correct answer is: Transverse Abdominis

The transverse abdominis is primarily responsible for stabilizing the spine due to its unique anatomical and functional characteristics. This muscle is located deep within the abdomen and acts like a natural weight belt by providing support to the spine and pelvis during movement. When contracted, it increases intra-abdominal pressure, which helps to stabilize the lumbar spine and maintain proper posture. This stabilization is essential during various movements and exercises, helping to protect the spine from injury and ensuring that power is effectively transferred through the core during activities involving the upper and lower body. Other muscles listed, such as the latissimus dorsi, gluteus maximus, and rectus abdominis, also play crucial roles in movement and stability but are not primarily focused on spinal stabilization in the way the transverse abdominis is. While those muscles contribute to overall core strength and may support certain movements, they do not provide the same level of direct stabilization to the spine as the transverse abdominis does.