College of Massage Therapists of British Columbia (CMTBC) Practice Exam

In lower cross syndrome, if a patient's abdominal muscles are weak, which other muscles are likely to test weak?

1. Hip flexors

2. Gluteus maximus

3. Hamstrings

4. Quadriceps

The correct answer is: Gluteus maximus

Lower cross syndrome is characterized by a specific pattern of muscle imbalances associated with postural issues, typically involving the pelvis and lumbar spine. When the abdominal muscles are weak, there is often an accompanying weakness in the gluteus maximus. This is due to the relationship between the pelvic positioning and the recruitment of these muscles. In lower cross syndrome, the weak abdominal muscles fail to provide adequate support to the pelvis, which can lead to an anterior pelvic tilt. As a consequence, the gluteus maximus, which functions to extend and externally rotate the hip, can become underactive. Weakness in the gluteus maximus inhibits proper hip extension and stability, contributing to compensatory patterns in surrounding muscle groups. Recognizing this connection helps in understanding how strengthening the abdominal muscles can lead to improved activation and function of the gluteus maximus, thereby promoting better posture and movement patterns in individuals with lower cross syndrome.