Hi Brat.. When I get spasms in my lower back, it usually means that those muscles are weak. I used to have that all the time until a physiatrist showed me an exercise to guard against it. Now I hardly ever get them.

I do this in bed, before rising, every day. Lay flat on your back and stretch your legs out, then bring your knees up to your nose, a little at a time, until you can comfortably get there and hold it/them there for a minute (I sometimes hold my legs and rock back and forth) Do this a few times.

Us MSers use our backs too much, when we should be using our legs for lifting and moving.

To strengthen your legs and hips...lay flat and lifting your leg slightly off the mat/bed, swing your right leg out to the right and back a few times and then your left leg out to the left and back. you can feel it in your hips.

This is now a morning ritual with me and it saves me a lot of spasm pain in the small of my back.

I hope it helps you.