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  • Evolution Myotherapy

Learn Your Muscles: Rectus Abdominis

The rectus abdominis is an important postural muscle. It is responsible for flexing the lumbar spine, as when doing a "crunch" sit up. The rib cage is brought up to where the pelvis is when the pelvis is fixed, or the pelvis can be brought towards the rib cage (posterior pelvic tilt) when the rib cage is fixed, such as in a leg-hip raise. The two can also be brought together simultaneously when neither is fixed in space.

The rectus abdominis assists with breathing and plays an important role in respiration when forcefully exhaling, as seen after exercise as well as in conditions where exhalation is difficult such as emphysema. It also helps in keeping the internal organs intact and in creating intra-abdominal pressure, when exercising or lifting heavy weights, during forceful defecation or childbirth.

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