NETA Personal Trainer Practice Exam

What type of pelvic tilt is caused by shortened iliopsoas and erector spinae muscles?

1. Posterior pelvic tilt

2. Lateral pelvic tilt

3. Neutral pelvic tilt

4. Anterio pelvic tilt

The correct answer is: Anterio pelvic tilt

The correct answer, anterior pelvic tilt, occurs when there is an imbalance in the muscles surrounding the pelvis. Shortened iliopsoas and erector spinae muscles play a crucial role in this condition. The iliopsoas, made up of the iliacus and psoas major muscles, is a hip flexor that contributes to lifting the front of the pelvis. When these muscles become shortened or overactive, they can pull the pelvis forward, resulting in an increased lumbar lordosis (excessive curvature in the lower back). Similarly, the erector spinae muscles, which run along the spine, also extend the back and can contribute to maintaining this forward pelvic position. When both muscle groups are shortened, they can create a structural imbalance, tipping the pelvis forward and leading to an anterior pelvic tilt. In contrast, a posterior pelvic tilt would involve the opposite muscle function, often related to tightness in the hamstrings and abdominal muscles. Lateral pelvic tilt refers to tilting of the pelvis to one side, not primarily influenced by the iliopsoas or erector spinae. A neutral pelvic tilt is achieved when the pelvis is in a balanced position, which does not occur when these muscles are shortened.