What Really Causes Back Pain - Part 4 Abdominal Muscles
Posted: Wed 04 Feb, 2009 11:58 pm
The two worst exercises ever introduced into the military were full sit-ups [ where the back leaves the floor ] and bunny-hops .
When you do a full sit-up, your spine bends forward. We call this flexion.This compresses the disks in your spine on the stomach side of your body. This can then cause the opposite side of the disk [ more towards your back ] to start to squeeze out towards the spinal nerves [ just like putting force on one side of a jam sandwich causes the jam to come out the opposite side ]. I’ll cover more of this on a posting on herniated disks, but if this continues, the disk will bulge and may eventually herniate. This is not something you want.
http://www.backache.md/images/analat3.gif
http://www.wkni.org/images/spinef3.gif
If you look at the previous picture, you can see the little knobbly bits on the left. They are called the spinous processes. If you stand up and bend forward from the waist, you can feel them sticking out as they run up and down your spine. The picture shows someone standing up viewed from their right hand side. A normal lower back [ lumbar curve ] as viewed should curve to the left of the picture as viewed from the right side of the person. Too much curve is bad too little curve is bad. I’ll show some tests later on to find out whether your curve is OK.
When you do a sit-up, that curve reverses itself and that’s when trouble can start.
The next problem is that your internal organs get compressed. They were not designed for that to happen.
If you have to do sit-ups, do crunches, where the lower back does not leave the floor.
The next horrible “exercise” was “bunny-hops”. I remember having to squat down, put a rifle behind my neck and hop up and down the gym floor. This puts massive compressive forces on the spine and knees. Very, very bad for the back.
Doing full sit-ups causes one more problem.
http://msjensen.cehd.umn.edu/WEBANATOMY ... orso_1.jpg
If you look at the previous picture, it shows the rectus abdominus muscles [ the “six-pack” ]. These attach to the breast bone area at the top and the pubic area at the bottom. When you strengthen a muscle, it contracts or shortens. When the rectus abdominus contracts, it pulls your body forward. This then causes the lower back muscles to tighten up in order to keep the spine erect.
Dave
When you do a full sit-up, your spine bends forward. We call this flexion.This compresses the disks in your spine on the stomach side of your body. This can then cause the opposite side of the disk [ more towards your back ] to start to squeeze out towards the spinal nerves [ just like putting force on one side of a jam sandwich causes the jam to come out the opposite side ]. I’ll cover more of this on a posting on herniated disks, but if this continues, the disk will bulge and may eventually herniate. This is not something you want.
http://www.backache.md/images/analat3.gif
http://www.wkni.org/images/spinef3.gif
If you look at the previous picture, you can see the little knobbly bits on the left. They are called the spinous processes. If you stand up and bend forward from the waist, you can feel them sticking out as they run up and down your spine. The picture shows someone standing up viewed from their right hand side. A normal lower back [ lumbar curve ] as viewed should curve to the left of the picture as viewed from the right side of the person. Too much curve is bad too little curve is bad. I’ll show some tests later on to find out whether your curve is OK.
When you do a sit-up, that curve reverses itself and that’s when trouble can start.
The next problem is that your internal organs get compressed. They were not designed for that to happen.
If you have to do sit-ups, do crunches, where the lower back does not leave the floor.
The next horrible “exercise” was “bunny-hops”. I remember having to squat down, put a rifle behind my neck and hop up and down the gym floor. This puts massive compressive forces on the spine and knees. Very, very bad for the back.
Doing full sit-ups causes one more problem.
http://msjensen.cehd.umn.edu/WEBANATOMY ... orso_1.jpg
If you look at the previous picture, it shows the rectus abdominus muscles [ the “six-pack” ]. These attach to the breast bone area at the top and the pubic area at the bottom. When you strengthen a muscle, it contracts or shortens. When the rectus abdominus contracts, it pulls your body forward. This then causes the lower back muscles to tighten up in order to keep the spine erect.
Dave