A.K.A. Sacroiliac joint:
I wanted to give a little history about how I ended up finding out about Pilates. I did not have a clear direct path to it, but through avenues and byways I got there. As you know, I was a dancer. In high School, I went to Lincoln High here in San Jose, I went there for the dance....of course musical theater played a role and so did women's choir. When I was a freshman it had already been discovered that I had one leg longer than the other. This is not uncommon among the general population. Because of this problem I have uneven hips. So, one day I was doing a forward hamstring stretch, i.e. leaning forward with my chest towards on thighs. When I came back up, the pain is/was indescribable! It was horrible! The pain was like an electric shock that went from my low back, in my glutes, and down my leg. It was so bad I was flat on my back, couldn't walk, and my big brother had to carry me into the car and up to the Chiropractor's office. Praise God, my mom believed in Chiropractic care, after the first adjustment, I felt some release. The chiropractor told me, if I wanted to continue dancing I better learn how to use my core, (my pelvic floor) to support myself. I was pretty much all glutes and quads back then. I worked out HARD CORE back then, but I was using all the wrong muscles. It took YEARS of chiropractic care and with the help of AWESOME dance teachers at UCI that I haven't had any SI instability that set me back like that did.
Without getting overwhelmed I want to lay it out for you what this SI joint is and what it all about and of course how you can help yourself-

So, here is where you might feel the on set of pain. If you still need a better idea of where it's located on your body- you can see these joints as the two dimples on each side of your low back, at about the belt line. There are many reasons why the pain might be set on, but there is no ONE reason as to why pain happens. It can come from
- degenerative arthritis
- leg length inequality
- pregnancy
- gout
- rheumatoid arthritis
- psoriasis
- ankylosing spondylitis
Also, basically any thing that alters normal walking pattern.
- leg length inequality
- hip
- knees
- ankles
- foot
It can also come from lack of movement in the joint or two much movement in the joint. Really there isn't too much movement that even happens in the joint. As you can see, this joint holds all of the weight of your body. So, hate to break it to you, if you are overweight, you are more prone to having low back, and SI joint pain. Hormones that are released at the end of delivery causes the joint to become more flexible. With multiple births for one mommy, this can lead to arthritis in the SI joint. That in turn causes stiffness and less movement in the joint.

Here it is! What your pelvis looks like:) Your Sacrum (AKA spine just above your tailbone) is being connected on both your right and left side Ilium ( AKA your hip bones) with the Sacroiliac (AKA SI joint). The SI joint are VERY STRONG ligaments, which is covered by cartilage, it is a fairly large join in the body. The SI joint is what connects the spine to the pelvis. This joint is what you call a synovial joint, similar to knee, hip and shoulder. It slides, tilts, and rotates.
When in pain you may feel it in your low back, back of hips, groin, or thighs.
Some general ways that if you have experienced this pain, to get out of pain or to deal with it are:
- Anti-flammatories
- limit activity
- Physical therapy
- a Sacroiliac belt
- injections
- fusing the joint surgery
- PILATES! ;)
The key is to stretch and strengthen the muscles around the area. Your core, glutes, thighs, muscles around the hip, and back. Lucky for you Pilates touches all these areas.
To end my story of my history with Pilates: I continued to go the chiropractor all threw high school, about once a week- as it felt better I could limit the once a week to maybe once every other week. I had to use a lift in my shoe. As I went off to College, I would still have the on set of pain at really any given moment- the only thing is, I just didn't know when it would come. As I learn more about it, I could say it may have had something to do with my plantar fasciaitis.... maybe? With my GREAT teachers at Irvine, they really taught me how to lift out of my hips while dancing, use the correct muscles, not my glutes and quads for everything. I was however still going to Chiropractor, till I had Pilates one quarter. I hated it at first, it was so hard for me to find my "neutral spine" I didn't like the way it shaped me, and it was just weird!!! But as I used my fundamentals of Pialtes in my dance classes, I never really had SI pain. Yes, it came by, but it was more due to stress, and just back in August, it flared up, but that was due to my own stupidity: Note to self do not pick up your 46pound son, during the first trimester of your pregnancy. Also, I am always going to be prone with my leg length issue, but with practicing Pilates daily as my most blessed job, I am keeping my SI joint stable. A good Chiropractor on hand is always good too.
So, if you have SI pain, give Pilates a try, the only thing you have to loose is pain :)