Which system’s action is exemplified by the Swan exercise?

Which system’s action is exemplified by the Swan exercise?

• A. Anterior Oblique Sling System
• B. Posterior Oblique System
• C. Deep Longitudinal System
• D. Lateral System

Answer: (C)

The Swan focuses on the Deep Longitudinal System, showing how energy travels along a long, continuous line from the back of the head down the spine and into the pelvis and legs. In this exercise, the spine extends smoothly while the pelvis stays stabilized, which engages the long back muscles (like the erector spinae) and the connective tissue along the spine (the thoracolumbar fascia) to create a controlled extension. The glutes and hamstrings help keep the pelvis steady, preventing collapse and allowing the lengthwise line from head to tailbone to remain intact. This demonstrates how stability and propulsion can arise from a long, uninterrupted posterior chain working together. The movement is mostly in a sagittal, back-extension pattern without the diagonal load or cross-lateral pairing that characterizes the posterior oblique system, and without the side-bending or rotational emphasis of the lateral or anterior oblique systems.

The Swan focuses on the Deep Longitudinal System, showing how energy travels along a long, continuous line from the back of the head down the spine and into the pelvis and legs. In this exercise, the spine extends smoothly while the pelvis stays stabilized, which engages the long back muscles (like the erector spinae) and the connective tissue along the spine (the thoracolumbar fascia) to create a controlled extension. The glutes and hamstrings help keep the pelvis steady, preventing collapse and allowing the lengthwise line from head to tailbone to remain intact. This demonstrates how stability and propulsion can arise from a long, uninterrupted posterior chain working together.

The movement is mostly in a sagittal, back-extension pattern without the diagonal load or cross-lateral pairing that characterizes the posterior oblique system, and without the side-bending or rotational emphasis of the lateral or anterior oblique systems.