It has been long believed that the primary function of the rectus abdominus (pictured) is to produce spinal flexion. All you have to do is have a look the insertion and origin to see the logic in this; but is it logical?
From a standing position (the way our bodies were designed) if you were to flex forward how much recruitment is required from them rectus abdominus? Not much; gravity does most of the work.
I would like to challenge your thought process for a moment; first look at the primary function of the core (that is the abdominal section of the core) ; is it to create movement or prevent movement? Most text books would have you believe that it is to create movement but the fact of the matter is that the function of the core is to prevent movement occurring;stabilizing the lumbar spine.
Now getting back to the rectus abdominus; I see the primary function of the rectus abdominus being eccentric deceleration of the trunk into extension, thus preventing the spine from going into extension and causing potential injury to the lumbar spine.
If you look at the anatomy of the rectus abdominus (RA) you will see the RA is crossed by three fibrous bands which are named the tendinous inscriptions; these aid in the eccentric bracing or;breaking; external when forces are applied.
If you dont understand the above, the long and short of it is that:
The purpose of the rectus abdominis is to prevent movement not create it. Situps train against this function.
From a standing position (the way our bodies were designed) if you were to flex forward how much recruitment is required from them rectus abdominus? Not much; gravity does most of the work.
I would like to challenge your thought process for a moment; first look at the primary function of the core (that is the abdominal section of the core) ; is it to create movement or prevent movement? Most text books would have you believe that it is to create movement but the fact of the matter is that the function of the core is to prevent movement occurring;stabilizing the lumbar spine.
Now getting back to the rectus abdominus; I see the primary function of the rectus abdominus being eccentric deceleration of the trunk into extension, thus preventing the spine from going into extension and causing potential injury to the lumbar spine.
If you look at the anatomy of the rectus abdominus (RA) you will see the RA is crossed by three fibrous bands which are named the tendinous inscriptions; these aid in the eccentric bracing or;breaking; external when forces are applied.
If you dont understand the above, the long and short of it is that:
The purpose of the rectus abdominis is to prevent movement not create it. Situps train against this function.