How many vertebrae are found in the lumbar region?

The lumbar region of the human spine consists of five vertebrae. These vertebrae, labeled L1 through L5, are located between the thoracic vertebrae and the sacrum. The lumbar vertebrae are larger and more robust compared to those in the cervical and thoracic regions, as they must support a greater portion of the body's weight and provide stability while allowing for a range of motion, including flexion, extension, and lateral bending. This design accommodates activities like lifting and bending, which place significant stress on the lower back.

This anatomical characteristic, along with their positioning, makes the lumbar vertebrae crucial for overall spinal function and health. Understanding the structure and function of the lumbar region is essential for fitness instructors, especially when teaching exercises that target the back and core to ensure proper form and to prevent injury.