I'm a 48 year old woman. I'm only slightly (10 lbs) overweight, and in generally good health.
Two years ago, I was getting into better shape by joining a gym (I had been exercising at home for years before that). I was going to the gym a lot, doing aerobic machines and getting back into light weightlifting for the first time in many years. I was doing great until I did some light weights (2 plates) on the leg press machine (where you lie down and press with your legs). Something happened...my back didn't feel right. Note that I had
slowly been building up to the 2 plates for MONTHS on that machine...and had done that same weight before!
I have a history of a herniated disc at L5/S1, so I assumed that something had aggrivated it. I was very careful for a month. But then one morning, when trying to clear some food that got stuck in my tonsils, I had a severe gag reflex and then my lower back went into severe spasm (esp. on the left side). It was painful as hell and wouldn't let up. I had to take narcotics and Prednisone to make it go away.
Like I said, that was two years ago. When the initial terrible spasm subsided, I was left with pain near the SI joints, and sitting was painful. As the months progressed, I went to PT, had acupuncture, tried Egoscue exercises, and osteopathic manipulation. As the months went by, each of these modalities would help a little bit, but ultimately the problem would not go away. A few months ago, I had some epidural cortisone shots, which have helped take the edge off -- but my back muscle still feel tight.
Now I believe that what is wrong with me is a muscle imbalance. The left side of my back feels tighter than the right side, no matter what I do. I often feel very stiff, and the stiffness moves around. Sometimes it's in my lower back, and sometimes in my mid-back. Daily I do various stretches for piraformis, hip flexors, hamstrings, and quadraceps. I also do some Egoscue exercises. I do a lot of walking (both on an outdoor track and treadmill) and some cycling on a Lifecycle. I take anti-inflammatories sometimes, and use a lot of heat to keep the muscles feeling loose.
One thing that really bothers me, which I believe is related to my muscle problem: I noticed that often when I stand, I am involuntarily contracting my gluteal muscles. For instance, if I'm standing at the sink brushing my teeth, I notice that my glutes are very tight and try to consciously relax them. This is not normal, and I don't remember doing this before my injury two years ago. I think that it is some sort of muscle compensation, but I have no idea what the real problem is, and my PT doesn't seem to have a clue, either. He did some movements on me and it only made me feel much worse for a week. I don't know if I'll go back to him. I had seen another PT, but she was only keen on doing core exercises. I'm not ready for those yet. I tried some for a few weeks and it flared up my pain very badly.
I would appreciate suggestions that anyone could offer regarding my problem. None of my practictioners seems to be able to truly help me. I can't lift or carry anything heavy because immediately my middle to lower back begins to hurt. I can't even push a halfway heavy shopping cart in the store without my back beginning to hurt. I HATE THIS!!!!
My core is totally out of shape, but if I try to do core exercises it hurts my back. McKenzie back extension exercises usually hurt me, as well. The most success I've had in these two years has been with a few Egoscue exercises and some treatments from the osteopath. But I'm reluctant to go back to the osteopath, because often my back will hurt worse for weeks from his treatments (eventually it feels better, but again it doesn't seem to cure my back pain). The osteopath has told me that I have very tight facia on the left, and that my sacrum is often twisted. The orthopedist who gave me the epidural injections laughed at that statement and said that there's no way a sacrum could get twisted. WHO DO I BELIEVE??!!
Lately I'm "functional." I can go to the gym and do my little aerobic workout (treadmill and biking). I have some pain and discomfort but I just deal with it "as needed." But I'd really love to be normal again and do the other things I used to.

I hate this cycle of waking up every morning and wondering how my back will feel today...will I be able to do the things I want to do....and feeling like a semi-invalid, relying on my kids and husband to do the "heavy" work around the house that I USED TO be able to do!