Which term is used to describe an excessive inward curve of the lower back?

The term that describes an excessive inward curve of the lower back is "lordosis." This condition, also sometimes referred to as "swayback," occurs when the lumbar spine curves more than normal, which can lead to discomfort or pain in the lower back. This excessive curvature can result from various factors, including muscle imbalances, obesity, or certain medical conditions.

To further clarify, scoliosis refers to an abnormal lateral curvature of the spine, which differs from lordosis as it involves side-to-side curvature rather than forward arching. Kyphosis indicates a forward rounding of the back, often seen in the thoracic region, and is characterized by an outward curve rather than inward. A fracture, on the other hand, denotes a break in a bone and is not related to spinal curvature conditions. Therefore, the emphasis on lordosis correctly identifies the excessive inward curve specifically associated with the lower back region.