Stomach muscle fatigue?

Hey gang. Today I have experienced something that can only be described as abdominal muscle fatigue. It hit me around noon and I've been reeling from it all day. It's like this wave of discomfort/tension/etc whenever I stand up for a while. It's very strange and I was just wondering if anyone has ever heard of this or had it happen to you?? Thanks.

Any particular reason why the abdominal wall would be fatigued? Were you working out? Doing sit-ups for the entire Scrubs marathon? Replaced your lazy boy with a Captain's Chair?

No actually I had another steroid injection in my lower spine the other day and I'm relaxing from that and hoping it helps my bulging disc! I wasn't doing anything except standing occasionally. It would start to hurt so I'd sit back down and it would continue for a while then lay off. I'm not sure what the hell I'm even feeling. I think it feels like muscle fatigue but who knows.

You have back problems? That goes hand in hand with stomach muscle weaknes and spasms. You might want to let the doc who shot you with the steroids know what you are feeling.
I had major back problems before the loss.
kp