Ab Exercises – to Flex or Not to Flex?
Filed Under: Core Training
Filed Under: Core Training
….that is the question. Are spinal flexion movements like crunches and situps damaging to the spine, or nothing to worry about?
If you’re familiar with top spine researcher Dr. Stuart McGill, you should know that his research shows that repeated flexion, such as doing 15 minutes of crunch and situp variations, can be damaging to the discs.
I attended one of his seminars on core stability a while back at Palmer Chiropractic College. Having read some of his articles, I was fairly familiar with his concepts for core training.
Recently, I listened to a podcast with Dr. McGill and he stated his belief that we have a limited number of forward flexion (bending) cycles in each one of us and that doing lots of these type of ab exercises just wastes that number.
He thinks that those who have tempted fate in this manner, may have genetics that allow them to get away with it, up to a point. He advocates “bracing” the abs isometrically to support the spine and strengthen the abdominal wall……
a wall with different layers of muscles running in different directions, kind of like plywood, where the different layers are stronger together than any of them on their own.
Plank exercises are the starting point for these different “bracing” strategies of core stability. These can be done in the front and side positions, and bridges can address the glute and back muscles.
McGill recently has done studies with competitive strongmen, like the ones you see on ESPN, lifting massive amounts of weight.
This confirmed the role of the quadratus lumborum as an important spine stabilizer. These muscles run from the bottom of your ribcage to the pelvis and also attach to the spine.
When you carry a heavy suitcase in one hand, it places a lot of demand on this muscle to keep your back straight – or when you carry a heavy suitcase in both hands, these muscles are working hard to support your spine.
So training your abs and low back to stay tight when lifting heavy objects is one of the benefits to this method of training. Improved posture is another.
If you are someone who has had disc problems or sciatica, then situps and crunches are the last thing you want to do, as this puts unnecessary stress on your back.
One of the few exceptions to doing flexion might be those with too much curve in their low back. A few sets of reverse crunches might help keep everything in a more neutral position.
After basic stability is gained, I like to use sandbag exercises and suspension training for increased intensity to your midsection – teaching your upper and lower body to work with your “core” for increased coordination – the way it works in real life situations.
Get Moving!
Brian Morgan
