What is anterior pelvic tilt characterized by?

Anterior pelvic tilt is characterized by an increased lordotic curvature of the lumbar spine. This condition occurs when the pelvis tilts forward, causing the lower back to curve more than normal. As the pelvis moves forward, it alters the alignment of the spine, resulting in a pronounced arch in the lumbar region. This alteration can lead to changes in posture and may contribute to discomfort or increased risk of injury if not addressed.

The other choices do not accurately describe anterior pelvic tilt. Standard spinal curvature refers to a neutral alignment without the specific adjustments seen in anterior pelvic tilt. The contraction of the hamstrings typically would promote a posterior pelvic tilt, and enhanced thoracic extension is unrelated, as it pertains to the spine's upper segment rather than the lumbar region affected by the pelvic position. Thus, the presence of increased lordotic curvature in the lumbar spine is a key characteristic of anterior pelvic tilt.