CanFitPro Personal Training Specialist Test 2025 – 400 Free Practice Questions to Pass the Exam

Lower crossed syndrome is a postural imbalance characterized primarily by an alteration in the alignment and function of the muscles surrounding the pelvis and lumbar spine. In this syndrome, there is often an overactivity or tightness in certain muscle groups, combined with weakness in others.

The correct choice focuses on the iliopsoas and rectus femoris muscles. The iliopsoas, comprising the iliacus and psoas major, is a key flexor of the hip that becomes tight due to prolonged sitting and postural habits. This contributes to anterior pelvic tilt, a hallmark of lower crossed syndrome. Concurrently, the rectus femoris is one of the quadriceps muscles and also acts as a hip flexor. When these muscles are tight, they can further pull the pelvis forward, exacerbating the postural issues associated with lower crossed syndrome.

Understanding the role of these muscle groups illustrates the mechanisms at play in this syndrome, highlighting the importance of addressing muscle imbalances to help mitigate the effects on posture and reduce the risk of injury. It's essential for personal trainers to recognize these patterns in clients to design effective corrective exercise programs.