The quadruped rock back test is used to determine:

The quadruped rock back test is designed to assess the amount of thoracic extension necessary to perform a full squat. This test evaluates the mobility and flexibility of the thoracic spine, which is critical for maintaining an upright torso during squatting movements. A proper squat relies heavily on the ability to extend the thoracic region while keeping the lumbar spine stable. If the thoracic spine is restricted in its range of motion, it can lead to compensatory patterns that affect squat depth and overall movement quality.

An effective squat requires the alignment and movement of several joints, and adequate thoracic extension allows for proper positioning of the rib cage, which influences the pelvis and lower extremities. Therefore, this test serves as a valuable tool for identifying individuals who may need corrective exercises to improve thoracic mobility and, subsequently, squat performance.