Abdominal Mechanics

How it works

Highlighted claims

• Abdominal function is better understood through leverage and length-tension relationships than through facilitation or inhibition labels. — Correctives, Abdominals, and Posterior Pelvic Tilt
• In a narrow infrasternal angle the external obliques have more concentric leverage because the ribcage has greater anterior-to-posterior dimensions. — Correctives, Abdominals, and Posterior Pelvic Tilt
• In a narrow infrasternal angle the internal obliques are placed on stretch and are more eccentrically oriented with less leverage for concentric action. — Correctives, Abdominals, and Posterior Pelvic Tilt
• The transversus abdominis contributes to internal rotation of the ribs; when ribs are externally rotated it is eccentrically oriented and lacks leverage for concentric action rather than being inactive. — Correctives, Abdominals, and Posterior Pelvic Tilt
• The rectus abdominis gains leverage when the sternum is depressed or when the pelvis is posteriorly tilted. — Correctives, Abdominals, and Posterior Pelvic Tilt
• When the lateral ribcage dimension expands and anterior-to-posterior depth decreases, internal obliques and transversus abdominis gain concentric leverage while external obliques become more eccentrically oriented. — Correctives, Abdominals, and Posterior Pelvic Tilt