Delayed muscle soreness? More like surprise muscle soreness!
 

I've been working out on a regular basis since May-ish. This Saturday I had no plans (was on-call for work in the evening so I didn't make any) so I decided to add a little bit to my workout. Usually I do a round of 30 Day Shred and then run for a half hour OR I run for an hour. On Saturday I did JUST the weights segments of 30 Day Shred, gave myself 3 minute breaks between each and a 10 minute break before running for an hour. No biggie. Sunday was like any other day, I felt good, but ran for only a half-hour because I had some other plans.

Monday morning, I can't MOVE! I'm in so much (muscle) pain across my lower back and down the side of my tummy. It hurts to stand, it hurts to walk! What did I do to myself? Running for an hour is relatively new, but I've done it ~4 times now and have never been sore from it! Could this be nutritional? I've gone through the whites of almost two dozen eggs in the last 3 days so I know I've been eating protein. I ate a whole bag of spinach greens on Saturday, too! Plus I take fish oil pills.

This makes no sense!

I can't really answer you but I've revamped my core workout and did planks for 1 minute instead of 30 seconds and I've never been in so much pain in my life. It hurts to laugh and sneeze. I also upped the side planks to a minute so my entire torso hurts, lol. I know as I've gotten older the muscle soreness has gotten worse. I wish I could offer more help. Sorry. :(

If you can't MOVE, your back muscles might be in spasm. This is what people refer to as "throwing their back out". It doesn't even need to be the activity that does it. My wife did while turning, pushing a vacuum, and then again while lifting a floral arrangement (which she does on an hourly basis, she's a floral designer, so it isn't like it was a foreign activity).

You might need to have a doctor check you out. Not being able to stand is not standard muscle soreness.

mimi - sounds like how I felt on Christmas Eve morning...I had to go to a 24 hour medical clinic and get muscle relaxers for the spasms in my back. Knock on Wood, it has not happened since.